while loop average grade program **PLZ HELP**

[wasteman]

Create a program to continually input grades from the user. Exit the loop when the user types a grade less than 0. Then tell the user how many grades he entered (eg. "You entered 5 grades") and calculate and report the average of the grades. Make sure it doesn't include the negative number!

heres what i got so far: I need it to calculate the average of the grades the user inputs, then output it. But i am having trouble doing that.



#include <iostream>
#include <string.h>
using namespace std;
int main()
{

int grades;
int count;
float avg;
float sum;
do {

count++;
cout<<"Enter a grade\n";
cin>>grades;
cout<<endl;



}while (grades>!0);



cout<<"You enterd"<<" "<<count <<" "<<"grades";
cout<<endl;


if (count)
{ avg = sum / count;

}

cout<<"The average of the grades is "<<avg;



return 0;
}

[keskiverto]

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