Why is my switch case not looping?

[Roman07]

This is my first time using the forum so im sorry for the bad format but please if someone can assist me it would be great, thanks. this is my code i want to to loop the whole program depending on the number of students but it doesn't for some reason.

#include<iostream>
#include <iomanip>
using namespace std;
void main() {
int no_students, no_courses, count = 1.0, q = 1;
float credit, sum = 0, sum_credits = 0;
char lgrade, fname[100], lname[100];
cout << "Enter number of students: ";
cin >> no_students;
while (q <= no_students)
{
{
cout << "Enter First name: ";
cin >> fname;
cout << "Enter Last name: ";
cin >> lname;
cout << "How many courses do you have? ";
cin >> no_courses;
while (count <= no_courses) {
cout << "Enter letter grade for course number " << count << " : ";
cin >> lgrade;

switch (lgrade) {
case 'A': cout << "Enter credit hours for course number " << count << " : ";
cin >> credit;
lgrade = 4.0; sum = sum + (credit * 4);
sum_credits += credit; break;

case 'B': cout << "Enter credit hours for course number " << count << " : ";
cin >> credit;
lgrade = 3.5; sum = sum + (credit * 3.5);
sum_credits += credit; break;

case 'C': cout << "Enter credit hours for course number " << count << " : ";
cin >> credit;
lgrade = 3.0; sum = sum + (credit * 3.0);
sum_credits += credit; break;

case 'D': cout << "Enter credit hours for course number " << count << " : ";
cin >> credit;
lgrade = 2.0; sum = (sum + credit * 2.0);
sum_credits += credit; break;

case 'F': cout << "Enter credit hours for course number " << count << " : ";
cin >> credit;
lgrade = 0.0; sum = (sum + credit * 0.0);
sum_credits += credit; break;

default: cout << "Invalid letter grade\n";
continue;
}
count++;

}
cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout.precision(2);


cout << "\nTotal GPA Grade for " << fname << " " << lname << " is: " << sum / sum_credits << endl;
}
q++;

}

}

[Thomas1965]

Have a look at all the warnings your code produces.

main.cpp(10): warning C4244: 'initializing': conversion from 'double' to 'int', possible loss of data
main.cpp(31): warning C4244: '=': conversion from 'double' to 'char', possible loss of data
main.cpp(36): warning C4244: '=': conversion from 'double' to 'char', possible loss of data
main.cpp(36): warning C4244: '=': conversion from 'double' to 'float', possible loss of data
main.cpp(41): warning C4244: '=': conversion from 'double' to 'char', possible loss of data
main.cpp(41): warning C4244: '=': conversion from 'double' to 'float', possible loss of data
main.cpp(46): warning C4244: '=': conversion from 'double' to 'char', possible loss of data
main.cpp(46): warning C4244: '=': conversion from 'double' to 'float', possible loss of data
main.cpp(51): warning C4244: '=': conversion from 'double' to 'char', possible loss of data
main.cpp(51): warning C4244: '=': conversion from 'double' to 'float', possible loss of data

If you fix these, maybe your program will work as expected.

[Roman07]

i fixed them but the problem is still there :/

[jonnin]

error: '::main' must return 'int'

your inner loop needs the variable to be re initialized.

count = 1;
while (count <= no_courses) ...