| Line 1: |
Line 1: |
| − | ==MyMatrix.h==
| + | #REDIRECT[[Directory:Derek Elder/Programs/MyMatrix]] |
| − | <pre>
| |
| − | #pragma once
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| − | #include <iostream>
| |
| − | using namespace std;
| |
| − | | |
| − | class MyMatrix
| |
| − | {
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| − | public:
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| − | MyMatrix();
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| − | MyMatrix(const MyMatrix& m);
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| − | MyMatrix(int rows, int columns);
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| − | ~MyMatrix();
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| − | MyMatrix operator+(const MyMatrix& m2) const;
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| − | MyMatrix operator-(const MyMatrix& m2) const;
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| − | MyMatrix operator=(const MyMatrix& m);
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| − | double* operator[](int i);
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| − | double* operator[](int i) const;
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| − | double getDeterminant(MyMatrix& m);
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| − | void Read(istream& is);
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| − | void Write(ostream& os) const;
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| − | private:
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| − | double **m_dpp;
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| − | int m_rows;
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| − | int m_columns;
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| − | };
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| − | istream& operator>>(istream& is, MyMatrix& m);
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| − | ostream& operator<<(ostream& os, const MyMatrix& m);
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| − | </pre>
| |
| − | ==MyMatrix.cpp==
| |
| − | <pre>
| |
| − | #include <iostream>
| |
| − | #include <cmath>
| |
| − | #include "MyMatrix.h"
| |
| − | using namespace std;
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| − | | |
| − | double MyMatrix::getDeterminant(MyMatrix& m)
| |
| − | {
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| − | int r, c;
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| − | r = m.m_rows;
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| − | c = m.m_columns;
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| − | | |
| − | double determinant = 0.0;
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| − | | |
| − | if(r == c)
| |
| − | {
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| − | if(r < 1)
| |
| − | {
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| − | cout<<"Less than one row and/or column";
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| − | exit(1);
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| − | }
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| − | else if(r == 1)
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| − | {
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| − | return m[0][0];
| |
| − | }
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| − | else if(r == 2)
| |
| − | {
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| − | //cout<<"The determinant is: "<<((m[0][0]*m[1][1]) - (m[0][1]*m[1][0]));
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| − | determinant = ((m[0][0]*m[1][1]) - (m[1][0]*m[0][1]));
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| − | return determinant;
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| − | }
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| − | else
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| − | {
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| − | for(int columns = 0; columns < m.m_columns; columns++)
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| − | {
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| − | MyMatrix m2((m.m_rows-1),(m.m_columns-1));
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| − | | |
| − | for(int subRows = 1; subRows < m.m_rows; subRows++)
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| − | {
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| − | int subColumns = 0;
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| − | | |
| − | for(int i = 0; i < m.m_columns; i++)
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| − | {
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| − | if(i != columns)
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| − | {
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| − | m2[(subRows-1)][subColumns] = m[subRows][i];
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| − | subColumns++;
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| − | }
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| − | }
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| − | }
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| − | determinant = determinant + ((m[0][columns])*(pow(float(-1),float(columns)))*(m2.getDeterminant(m2)));
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| − | }
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| − | }
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| − | return determinant;
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| − | }
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| − | else
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| − | {
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| − | cout<<"Error, the matrix is uneven, cannot determine the matrix, exiting program.";
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| − | exit(1);
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| − | }
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| − | }
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| − | MyMatrix::MyMatrix()
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| − | {
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| − | m_rows = 0;
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| − | m_columns = 0;
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| − | m_dpp = NULL;
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| − | }
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| − | MyMatrix::MyMatrix(int rows, int columns)
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| − | {
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| − | int i, j;
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| − | double *dp;
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| − | | |
| − | this->m_rows = rows;
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| − | this->m_columns = columns;
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| − | dp = new double[m_rows*m_columns];
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| − | m_dpp = new double*[m_rows];
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| − | | |
| − | for(i = 0;i < m_rows;i++)
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| − | m_dpp[i] = dp+(i * m_columns);
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| − | for(i = 0;i < m_rows;i++)
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| − | for(j = 0;j < m_columns;j++)
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| − | m_dpp[i][j] = 0;
| |
| − | }
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| − | MyMatrix::MyMatrix(const MyMatrix& m)
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| − | {
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| − | int i, j;
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| − | double *dp;
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| − | | |
| − | this->m_rows = m.m_rows;
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| − | this->m_columns = m.m_columns;
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| − | dp = new double[m_rows*m_columns]; //Real -> m_rows*m_columns != 0
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| − | m_dpp = new double*[m_rows];
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| − | | |
| − | for(i = 0;i < m_rows;i++)
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| − | m_dpp[i] = dp+(i * m_columns);
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| − | for(i = 0;i < m_rows;i++)
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| − | for(j = 0;j < m_columns;j++)
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| − | m_dpp[i][j] = m.m_dpp[i][j];
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| − | }
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| − | MyMatrix::~MyMatrix()
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| − | {
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| − | if(m_dpp != NULL)
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| − | {
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| − | delete [] m_dpp[0];
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| − | delete [] m_dpp;
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| − | }
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| − | }
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| − | MyMatrix MyMatrix::operator=(const MyMatrix& m)
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| − | {
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| − | int i, j;
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| − | | |
| − | if(this != &m)
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| − | {
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| − | if((m.m_rows == m_rows) && (m.m_columns == m_columns))
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| − | {
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| − | for(i = 0;i < m_rows;i++)
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| − | for(j = 0;j < m_columns;j++)
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| − | m_dpp[i][j] = m.m_dpp[i][j];
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| − | return *this;
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| − | }
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| − | if(m_dpp != NULL)
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| − | {
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| − | delete [] m_dpp[0];
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| − | delete [] m_dpp;
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| − | }
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| − | | |
| − | double* dp;
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| − | this->m_rows = m.m_rows;
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| − | this->m_columns = m.m_columns;
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| − | dp = new double[m_rows*m_columns];
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| − | m_dpp = new double*[m_rows];
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| − | | |
| − | for(i = 0;i < m_rows;i++)
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| − | m_dpp[i] = dp+(i * m_columns);
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| − | for(i = 0;i < m_rows;i++)
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| − | for(j = 0;j < m_columns;j++)
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| − | m_dpp[i][j] = m.m_dpp[i][j];
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| − | }
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| − | return *this;
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| − | }
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| − | double* MyMatrix::operator[](int i)
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| − | {
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| − | if(i >= 0 && i < m_rows)
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| − | return m_dpp[i];
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| − | else
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| − | {
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| − | cout<<"Error, Out of Range. Press enter to exit the program."<<flush;
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| − | cin.get();
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| − | cin.get();
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| − | exit(1);
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| − | }
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| − | }
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| − | double* MyMatrix::operator[](int i) const
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| − | {
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| − | if(i >= 0 && i < m_rows)
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| − | return m_dpp[i];
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| − | else
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| − | {
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| − | cout<<"Error, Out of Range. Press enter to exit the program."<<flush;
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| − | cin.get();
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| − | cin.get();
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| − | exit(1);
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| − | }
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| − | }
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| − | MyMatrix MyMatrix::operator+(const MyMatrix& m2) const
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| − | {
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| − | int i, j;
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| − | | |
| − | if((m2.m_rows != m_rows) || (m2.m_columns != m_columns))
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| − | {
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| − | cout<<"Error, different rows and/or columns.\n"
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| − | <<"Press enter to exit the program."<<flush;
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| − | cin.get();
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| − | cin.get();
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| − | exit(1);
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| − | }
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| − | MyMatrix sum(m2.m_rows,m2.m_columns);
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| − | for(i = 0;i < sum.m_rows;i++)
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| − | for(j = 0;j < sum.m_columns;j++)
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| − | sum.m_dpp[i][j] = m_dpp[i][j] + m2.m_dpp[i][j];
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| − | return sum;
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| − | }
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| − | MyMatrix MyMatrix::operator-(const MyMatrix& m2) const
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| − | {
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| − | int i, j;
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| − | | |
| − | if((m2.m_rows != m_rows) || (m2.m_columns != m_columns))
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| − | {
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| − | cout<<"Error, different rows and/or columns.\n"
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| − | <<"Press enter to exit the program."<<flush;
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| − | cin.get();
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| − | cin.get();
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| − | exit(1);
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| − | }
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| − | MyMatrix sum(m2.m_rows,m2.m_columns);
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| − | for(i = 0;i < m2.m_rows;i++)
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| − | for(j = 0;j < m2.m_columns;j++)
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| − | sum.m_dpp[i][j] = m_dpp[i][j] - m2.m_dpp[i][j];
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| − | return sum;
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| − | }
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| − | void MyMatrix::Read(istream& is)
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| − | {
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| − | int i, j;
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| − | int rows, columns;
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| − | | |
| − | if(is == cin)
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| − | {
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| − | cout<<"Enter the number of rows: "<<flush;
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| − | cin>>rows;
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| − | cout<<"Enter the number of columns: "<<flush;
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| − | cin>>columns;
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| − | | |
| − | if((rows == m_rows) && (columns == m_columns))
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| − | {
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| − | for(i = 0;i < m_rows;i++)
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| − | {
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| − | for(j = 0;j < m_columns;j++)
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| − | {
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| − | cout<<"m["<<i<<"]"<<"["<<j<<"] = "<<flush;
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| − | cin>>m_dpp[i][j];
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| − | }
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| − | }
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| − | }
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| − | else
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| − | {
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| − | if(m_dpp != NULL)
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| − | {
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| − | delete [] m_dpp[0];
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| − | delete [] m_dpp;
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| − | }
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| − | | |
| − | m_rows = rows;
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| − | m_columns = columns;
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| − | | |
| − | double *dp;
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| − | dp = new double[m_rows*m_columns];
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| − | m_dpp = new double*[m_rows];
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| − | | |
| − | for(i = 0;i < m_rows;i++)
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| − | m_dpp[i] = dp + (i * m_columns);
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| − | for(i = 0;i < m_rows;i++)
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| − | {
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| − | for(j = 0;j < m_columns;j++)
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| − | {
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| − | cout<<"m["<<i<<"]"<<"["<<j<<"] = "<<flush;
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| − | cin>>m_dpp[i][j];
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| − | }
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| − | }
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| − | }
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| − | }
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| − | else
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| − | {
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| − | is>>m_rows;
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| − | is>>m_columns;
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| − | | |
| − | if(m_dpp != NULL)
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| − | {
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| − | delete [] m_dpp[0];
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| − | delete [] m_dpp;
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| − | }
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| − | | |
| − | double *dp;
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| − | dp = new double[m_rows*m_columns];
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| − | m_dpp = new double*[m_rows];
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| − | | |
| − | for(i = 0;i < m_rows;i++)
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| − | m_dpp[i] = dp + (i * m_columns);
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| − | for(i = 0;i < m_rows;i++)
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| − | {
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| − | for(j = 0;j < m_columns;j++)
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| − | is>>m_dpp[i][j];
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| − | }
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| − | }
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| − | }
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| − | void MyMatrix::Write(ostream& os) const
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| − | {
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| − | int i, j;
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| − | | |
| − | if(os == cout)
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| − | {
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| − | if((m_rows == 0) || (m_columns == 0))
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| − | cout<<"The matrix is empty.\n";
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| − | | |
| − | for(i = 0;i < m_rows;i++)
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| − | {
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| − | if(i > 0)
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| − | cout<<"\n\n";
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| − | | |
| − | for(j = 0;j < m_columns;j++)
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| − | {
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| − | cout<<m_dpp[i][j]<<" ";
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| − | }
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| − | }
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| − | }
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| − | else
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| − | {
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| − | for(i = 0;i < m_rows;i++)
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| − | {
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| − | for(j = 0;j < m_columns;j++)
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| − | {
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| − | os<<m_dpp[i][j]<<"\n";
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| − | }
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| − | }
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| − | }
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| − | }
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| − | istream& operator>>(istream& is, MyMatrix& m)
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| − | {
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| − | m.Read(is);
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| − | return is;
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| − | }
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| − | ostream& operator<<(ostream& os, const MyMatrix& m)
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| − | {
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| − | m.Write(os);
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| − | return os;
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| − | }
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| − | </pre>
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| − | ==Main.cpp==
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| − | <pre>
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| − | #include <iostream>
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| − | #include <string>
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| − | #include "MyMatrix.h" | |
| − | using namespace std;
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| − | | |
| − | void main()
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| − | {
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| − | int rows,i,j;
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| − | double cr;
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| − | //MyMatrix m1, m2(2,3);
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| − | | |
| − | cout<<"How many equations would you like to solve? "<<flush;
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| − | cin>>rows;
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| − | | |
| − | MyMatrix m3(rows,rows); //Input matrix
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| − | MyMatrix m4(rows,1); //Answer matrix
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| − | | |
| − | for(i = 0;i < rows;i++)
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| − | {
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| − | for(j = 0;j < rows;j++)
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| − | {
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| − | cout<<"Enter the coefficent of row "<<(i + 1)
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| − | <<", column "<<(j + 1)<<": ";
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| − | cin>>m3[i][j];
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| − | }
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| − | cout<<"Enter what the row equates to: ";
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| − | cin>>m4[i][0];
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| − | }
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| − | cout<<"The determinant is: "<<m3.getDeterminant(m3)<<"\n";
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| − | | |
| − | MyMatrix m5(m3); //D Matrix
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| − | MyMatrix m6(1,rows); //Variable matrix
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| − | | |
| − | for(j = 0; j < rows;j++)
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| − | {
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| − | cr = 0;
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| − | for(i = 0;i < rows;i++)
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| − | {
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| − | m5[i][j] = m4[i][0];
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| − | }
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| − | cr = ((m5.getDeterminant(m5))/(m3.getDeterminant(m3)));
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| − | m5 = m3;
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| − | m6[0][j] = cr;
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| − | cout<<"cr"<<(j+1)<<" = "<<cr<<endl;
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| − | }
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| − | cout<<"Checking phase"<<'\n';
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| − | double var;
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| − | for(i = 0;i < rows;i++)
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| − | {
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| − | var = 0;
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| − | for(j = 0;j < rows;j++)
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| − | {
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| − | var += (m6[0][j] * m5[i][j]);
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| − | cout<<m5[i][j]<<" * "<<m6[0][j];
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| − | if(j != rows - 1)
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| − | {
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| − | cout<<" + ";
| |
| − | }
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| − | else
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| − | {
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| − | cout<<" = ";
| |
| − | }
| |
| − | }
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| − | cout<<var<<endl;
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| − | }
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| − | cout<<"\nHit enter to exit the program."<<endl;
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| − | | |
| − | /*cout<<"After:\n"
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| − | <<"MyMatrix m1, m2(2,3), m3;\n"
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| − | <<"m1:\n"<<m1
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| − | <<"\nm2:\n"<<m2
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| − | <<"\nm3:\n"<<m3;
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| − | | |
| − | cout<<"\n\nEnter the data for m3:\n"<<flush;
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| − | cin>>m3;
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| − | cout<<"\nThe matrix you entered follows:\n"<<m3;
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| − | cout<<"\nHit enter to continue: "<<flush;
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| − | cin.get();
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| − | cin.get();
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| − | | |
| − | cout<<"\nm3[0][0] = " << m3[0][0] << '\n';
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| − | | |
| − | m3[0][0] = 29.999;
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| − | | |
| − | cout<<"\nAfter:\n m3[0][0] = 29.999;\nm3 follows:\n"<<m3;
| |
| − | cout<<"\nHit enter to continue: "<<flush;
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| − | cin.get();
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| − | cout<<"\n\nEnter the data for m2:\n"<<flush;
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| − | cin>>m2;
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| − | cout<<"The matrix you entered follows:\n"<<m2;
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| − | cout<<"\nHit enter to continue: "<<flush;
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| − | cin.get();
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| − | | |
| − | m1 = m2 + m3;
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| − | | |
| − | cout<<"\n\nAfter:\n m1 = m2 + m3;\nm1 follows:\n"<<m1;
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| − | cout<<"\nHit enter to continue: "<<flush;
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| − | cin.get();
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| − | | |
| − | m1 = m2 - m3;
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| − | | |
| − | cout<<"\n\nAfter:\n m1 = m2 - m3;\nm1 follows:\n"<<m1;
| |
| − | cout<<"\nHit enter to continue: "<<flush;
| |
| − | cin.get();
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| − | | |
| − | m1 = m3;
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| − | | |
| − | cout<<"\n\nAfter:\n m1 = m3;\nm1 follows:\n"<<m1;
| |
| − | cout<<"\nHit enter to continue: "<<flush;
| |
| − | cin.get();
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| − | | |
| − | m1[0][0] = -999.876;
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| − | | |
| − | cout<<"\n\nAfter:\n m1[0][0] = -999.876;\nm1 follows:\n"<<m1
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| − | <<"\n\nm3 follows:\n" <<m3<<"\n\nIs this what you expected?";
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| − | cout<<"\n\nHit enter to exit the program: "<<flush;
| |
| − | cin.get();*/
| |
| − | }
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| − | </pre>
| |