Student average grade program

[alihajj95]

I've got this assignement and i dont really understand the question: Suppose there are 100 students in a class. You are asked to write a program that can accept the input of the students’ marks from the keyboard and calculate the class average and display it on the screen. Note that each mark is between 0 and 100.

That's where i got so far:

#include <iostream>
using namespace std;

int main()
{
    double avg;
    int i,a,sum=0;
    for (int i = 0; i< 100; i++)
    {
         cout <<" Enter a mark:";
         cin >> a;
         while (a <0 || a >100)
         cout <<"Error";
         cin >> a;
     }
     {
         sum = sum +a ;
        }
         avg = sum / 100.0;
          cout <<" The avg of the class is: " << avg <<endl;
        }
}

Thanks for the help

[Salem]

The first step is to learn how to indent code.

#include <iostream>
using namespace std;

int main()
{
  double avg;
  int i, a, sum = 0;
  for (int i = 0; i < 100; i++) {
    cout << " Enter a mark:";
    cin >> a;
    while (a < 0 || a > 100)
      cout << "Error";
    cin >> a;
  }
  {
    sum = sum + a;
  }
  avg = sum / 100.0;
  cout << " The avg of the class is: " << avg << endl;
//}
}

So for example, you have an extra brace at line 20.
The cin at line 13 is NOT part of your error correction loop input.
The summation at line 16 is NOT part of your input loop.

[alihajj95]

Yes so that's what the question was asking me to do?

[whiteflags]

I think you missed the mark. The problem statement said that there were 100 students, not 100 grades, so you probably calculated the wrong average. If every student has their own grades, the class average is going to be slightly different. I'm not your teacher though.