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3,576 bytes added , 22:45, 1 November 2007

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<pre>
#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <cmath>
using namespace std;

int main()
{
string first_name = string();
string last_name = string();
int test_score = 0;
int test_number = 0;
float total_score = 0.0;
bool done = false;
char grade = ' ';
char ch = ' ';

ifstream Input;
ofstream Output;
string Input_File_Name = string();
string Output_File_Name = string();

while(!done)
{
Input.clear();
cout<<"Please enter the name of your input file: ";
getline(cin,Input_File_Name);
Input.open(Input_File_Name.c_str());

if(!Input)
{
cout<<"The file name is invalid or the file is read protected.\n";
done = false;
}
else
{
cout<<"The file "<<Input_File_Name<<" exists.\n";

ch = Input.peek();

if(ch == EOF)
{
cout<<"The file "<<Input_File_Name<<" has no data in it."<<endl;
done = false;
Input.close();
}
else
{
cout<<"The file "<<Input_File_Name<<" has data in it."<<endl;
done = true;
}
}
}

done = false;

while(!done)
{
Output.clear();
cout<<"Please enter the name of your output file: ";
getline(cin,Output_File_Name);
Output.open(Output_File_Name.c_str());

if(!Output)
{
cout<<"Output file creation failed\n";
done = false;
}
else
{
cout<<"Output file creation successful\n";
done = true;
}
}

Output<<"-----------------------------Grade Calculator-----------------------------"<<endl;
Output<<endl;
Output<<"This program will process test scores to provide individuals"<<endl;
Output<<"with letter grades according to the following scale:"<<endl;
Output<<endl; // ||
Output<<" Average 90-100 A"<<endl;
Output<<" Average 80-89.9 B"<<endl;
Output<<" Average 70-79.9 C"<<endl;
Output<<" Average 60-69.9 D"<<endl;
Output<<" Average < 59.9 F"<<endl;
Output<<"--------------------------------------------------------------------------"<<endl;
Output<<"--------------------------------------------------------------------------"<<endl;

Input>>first_name>>last_name;
while(Input)
{
Output<<"Your name is :"<<first_name<<" "<<last_name<<endl;
Input>>test_score;

if(test_score < 0)
{
Output<<first_name<<" "<<last_name<<" you didn't take any tests"<<endl;
Output<<"--------------------------------------------------------------------------"<<endl;
}
else
{
Output<<"Your scores are :";
total_score = 0;
test_number = 0;
while(test_score >= 0)
{
total_score = total_score + test_score;
test_number++;
Output<<" "<<test_score;
Input>>test_score;
while(Input.fail())
{
Input.clear();
Input.ignore(100,' ');
Input>>test_score;
}
}

float test_average = total_score/test_number;

if(test_average >= 90)
grade = 'A';
else if(test_average >= 80)
grade = 'B';
else if(test_average >= 70)
grade = 'C';
else if(test_average >= 60)
grade = 'D';
else
grade = 'F';

Output<<endl<<first_name<<" "<<last_name<<", your average is "<<setprecision(1)<<fixed<<test_average
<<", and your letter grade is "<<grade<<endl;
Output<<"--------------------------------------------------------------------------"<<endl;
}
Input>>first_name>>last_name;
}
Output<<"Thank you for using this Grade Calculator.";

cout<<"Good day.\n";
Input.close();
Output.close();
return 0;
}
</pre>

Derek Elder

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Directory:Derek Elder/Programs/Grade Calculator (view source)

Revision as of 22:45, 1 November 2007