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Program compiles but does not calculate values. Writes 0 for grades. Infile exists and contains data.
// This program calculates a final grade using a formula, assigns a
// corresponding letter grade, and outputs a "witty" comment to the user.
//******************************************************************************
#include <iostream>
#include <fstream> // For file I/O
#include <string>
#include <iomanip>
#include <cmath>
using namespace std;
// Declare function prototypes
void OpenFiles(ifstream&, ofstream&);
// Pre:
// Post: File names have been prompted for and files are opened;
// Input file name has been written on output file
void GetAndPrintStudent (ifstream&, ofstream&);
// Pre:
// Post: Name has been read from inFile and written on outFile
void InputGrades (ifstream&, float&, float&, float&, float&, float&, float&,
float&, float&, float&);
// Pre: inFile is assigned and not empty
// Post: Grades have been read from inFile
float CalculateGrades (ifstream&, ofstream&, float, float, float);
// Pre:
// Post:
char GetLetterGrade (float);
// Pre:
// Post:
string GetWittyComment(ofstream&, char);
// Pre:
// Post:
void PrintGrades (ofstream&);
// Pre:
// Post: PrintGrades prints grade earned for each grade type, overall numeric
// grade, equivalent letter grade, and witty comment have been written to the
// console and outFile
int main()
{
// Declare and open files
ifstream inFile;
ofstream outFile;
float totalHwPts = 0, totalPrgrmPts = 0, totalExamPts = 0, maxHwPts,
maxPrgrmPts, maxExamPts, hwPercent, prgrmPercent, examPercent, hwPart,
prgrmPart, examPart, finalGrd;
char LETTERGRADE;
string WittyComment;
OpenFiles (inFile, outFile);
if (!inFile || !outFile)
{
cout << "Error opening files " << endl;
outFile << "Error opening files " << endl;
return 1;
}
GetAndPrintStudent (inFile, outFile);
InputGrades (inFile, totalHwPts, totalPrgrmPts, totalExamPts, maxHwPts,
maxPrgrmPts, maxExamPts, hwPercent, prgrmPercent, examPercent);
finalGrd = CalculateGrades (inFile, outFile, hwPart, prgrmPart, examPart);
LETTERGRADE = GetLetterGrade (finalGrd);
WittyComment = GetWittyComment(outFile, LETTERGRADE);
PrintGrades (outFile);
inFile.close();
outFile.close();
system ("pause");
return 0;
}
//******************************************************************************
void OpenFiles (ifstream& inFile, ofstream& outFile)
{
string inFileName; // User-specified input file name
string outFileName; // User-specified output file name
cout << "Enter the name of the input file." << endl;
cin >> inFileName;
inFile.open(inFileName.c_str());
cout << "Enter the name of the output file." << endl;
cin >> outFileName;
outFile.open(outFileName.c_str());
cout << "Grade calculator for students on " << inFileName << endl;
outFile << "Grade calculator for students on " << inFileName << endl;
outFile << fixed;
}
//******************************************************************************
void GetAndPrintStudent (ifstream& inFile, ofstream& outFile)
{
string line;
getline(inFile, line); // Process student name
cout << "Student Name: " << setw(25) << line << endl;
outFile << "Student Name: " << setw(25) << line << endl;
}
//******************************************************************************
void InputGrades (ifstream& inFile, float& totalHwPts, float& totalPrgrmPts,
float& totalExamPts, float& maxHwPts, float& maxPrgrmPts,
float& maxExamPts, float& hwPercent, float& prgrmPercent,
float& examPercent)
{
int count, numHw, numPrgrm, numExam;
float hwGrade, prgrmGrade, examGrade;
inFile >> numHw;
inFile >> maxHwPts;
count = 0;
totalHwPts = 0;
while (count < numHw)
{
inFile >> hwGrade;
totalHwPts = totalHwPts + hwGrade;
count ++;
}
inFile >> hwPercent;
inFile >> numPrgrm;
inFile >> maxPrgrmPts;
count = 0;
totalPrgrmPts = 0;
while (count < numPrgrm)
{
inFile >> prgrmGrade;
totalPrgrmPts = totalPrgrmPts + prgrmGrade;
count ++;
}
inFile >> prgrmPercent;
inFile >> numExam;
inFile >> maxExamPts;
count = 0;
totalExamPts = 0;
while (count < numExam)
{
inFile >> examGrade;
totalExamPts = totalExamPts + examGrade;
count ++;
}
inFile >> examPercent;
}
//******************************************************************************
float CalculateGrades (ifstream& inFile, ofstream& outFile, float hwPart,
float prgrmPart, float examPart)
{
float totalHwPts, totalPrgrmPts, totalExamPts, maxHwPts, maxPrgrmPts, maxExamPts,
hwPercent, prgrmPercent, examPercent, finalGrd;
if (maxHwPts > 0)
{
hwPart = (totalHwPts/maxHwPts) * (hwPercent);
return hwPart;
}
if (maxPrgrmPts > 0)
{
prgrmPart = (totalPrgrmPts/maxPrgrmPts) * (prgrmPercent);
return prgrmPart;
}
if (maxExamPts > 0)
{
examPart = (totalExamPts/maxExamPts) * (examPercent);
return examPart;
}
else
{
cout << "Error!" << endl;
outFile << "Error!" << endl;
}
finalGrd = (hwPart + prgrmPart + examPart)* 100;
return finalGrd;
}
//******************************************************************************
char GetLetterGrade (float finalGrd)
{
if (finalGrd <= 60)
{
return 'F';
}
else if (finalGrd <=69)
{
return 'D';
}
else if (finalGrd <=79)
{
return 'C';
}
else if (finalGrd <=89)
{
return 'B';
}
else if (finalGrd <=100)
{
return 'A';
}
}
//******************************************************************************
string GetWittyComment(ofstream& outFile, char LETTERGRADE)
{
switch (LETTERGRADE)
{
case 'A': return "A teacher's pet, I see!";
break;
case 'B': return "You're doing an awesome job!";
break;
case 'C': return "Keep your grades up.";
break;
case 'D': return "Pick up the pace a bit more.";
break;
case 'F': return "Do you want to flip burgers for the rest of your life?";
break;
default: cout << LETTERGRADE << " is not a valid letter grade."
<< endl;
outFile << LETTERGRADE << " is not a valid letter grade."
<< endl;
break;
}
}
//******************************************************************************
void PrintGrades(ofstream& outFile)
{
float hwPart, prgrmPart, examPart, finalGrd;
char LETTERGRADE;
string WittyComment;
cout << "Homework Grade is: " << fixed << setprecision(2) << setw(22)
<< hwPart << "." << endl;
outFile << "Homework Grade is: " << fixed << setprecision(2) << setw(22)
<< hwPart << "." << endl;
cout << "Program Grade is: " << fixed << setprecision(2) << setw(23)
<< prgrmPart << "." << endl;
outFile << "Program Grade is: " << fixed << setprecision(2) << setw(23)
<< prgrmPart << "." << endl;
cout << "Exam Grade is: " << fixed << setprecision(2) << setw(26)
<< examPart << "." << endl;
outFile << "Exam Grade is: " << fixed << setprecision(2) << setw(26)
<< examPart << "." << endl;
cout << "Final Grade is: " << fixed << setprecision(2) << setw(25)
<< finalGrd << "." << endl;
outFile << "Final Grade is: " << fixed << setprecision(2) << setw(25)
<< finalGrd << "." << endl;
cout << "You earned an: " << fixed << setprecision(2) << setw(26)
<< LETTERGRADE << "." << endl;
outFile << "You earned an: " << fixed << setprecision(2) << setw(26)
<< LETTERGRADE << "." << endl;
cout << WittyComment << fixed << setprecision(2) << setw(22) << endl;
outFile << WittyComment << fixed << setprecision(2) << setw(22) << endl;
}
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