Problem-3

#include <iostream>

using namespace std;
int main()
{
    int cnt = 0;
    int size;
    while(true) {
        cout << "Enter a size or a negative number to stop: ";
        cin >> size;
        if(size<0) {
            cout << "A total of " << cnt << " *s were printed.\n";
            break;
        }
        cnt += size*size;
        for(int i=0; i<size; i++) {
            for(int j=0; j<size; j++) {
                cout << "*";
            }
            cout << "\n";
        }
    }
    return 0;
}