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#include <iostream>
#include <iomanip>
#include <ctime>
#include <fstream>
using namespace std;
void clearGrades(int g[] int nG)
{
for(int i = 0; i < nG; i++)
{
g[i] = 0;
}
}
void setNumberOfGrades(int g[] &nG)
{
do
{
cout << "Number of Grades (0-5): ";
cin >> nG;
} while(nG < 0 || nG > 5);
}
void enterGrades(int g[], int nG)
{
for(int i = 0; i < nG; i++)
{
do
{
cout << "Grade " << i + 1 << " : ";
cin >> g[i];
} while(g[i] < 0 || g[i] > 100);
}
}
void randomGrades(int g[], int nG)
{
for(int i, i < nG; i++)
{
g[i] = rand()%101;
}
}
void readGrades(int g[], int nG)
{
ifstream inFile;
inFile.open("Grades.txt");
for(int i = 0; 1 <nG; i++)
{
inFile >> g[i];
}
inFile.close();
}
void writeGrades(int g[], int nG)
{
ofstream outFile;
outFile.open("Grades.txt");
for(int i = 0; 1 <nG; i++)
{
outFile << g[i] << " ";;
}
outFile.close();
}
float calcAverage(int g[], int nG)
{
if(nG == 0)
{
return 0;
}
else
{
int total = 0;
for(int = 0; i < nG; i++)
{
total = total + g[i];
}
return (total/float(nG));
}
}
const int gradeSize = 5;
int main()
{
int grades[gradeSize] = {};
int numberOfGrades = 0;
int menuSelection = 0;
srand(int(time(0)));
do
{
system("cls");
cout << "Number of Grades: " << numberOfGrades << endl;
cout << "Loaded Grades: ";
for(int i=0, i < numberOfGrades; i++)
{
cout << grades[i] << " ";
]
cout << fixed << setprecision(1) << endl;
cout << "Grade Average :" << calcAverage(grades, numberOfGrades) << endl << endl << endl;
cout << "(1) Set the number of grades" << endl;
cout << "(2) Enter the grades manually" << endl;
cout << "(3) Generate random grades" << endl;
cout << "(4) Read grades from Grades.txt file" << endl;
cout << "(5) Write grades to Grades.txt file" << endl;
do
{
cout << "Menu selection (1-5) : ";
cin >> menuSelection;
} while(menuSelection < 1 || menuSelection > 5)
cout << endl << endl;
switch(menuSelection)
{
case 1: clearGrades(grades, gradeSize);
setNumberOfGrades(numberOfGrades);
break;
case 2: clearGrades(grades, gradeSize);
enterGrades(grades, numberOfGrades);
break;
case 3: clearGrades(grades, gradeSize);
randomGrades(grades, numberOfGrades);
break;
case 4: clearGrades(grades, gradeSize);
readGrades(grades, numberOfGrades);
break;
case 5: writeGrades(grades, numberOfGrades);
break;
}
}while(true)
system("pause")
return 0;
}
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