C++ Program Introducation

#include
main () {
/* Determine final average and pass/fail status for each student.*/
int NumGr, StudNo, Sum, Gr;
float Avg;
cin >> NumGr;
while (cin >> StudNo) {
Sum = 0;
for (int Ct=1; Ct<=NumGr; Ct++) {
cin >> Gr;
Sum = Sum + Gr;
}
Avg = Sum / NumGr;
cout << StudNo << " " << Avg;
if (Avg > 60)
cout << " Pass" << '\n';
else
cout << " Fail" << '\n';
}
}