int main() { printGrade(-1); printGrade(55); printGrade(65); printGrade(75); printGrade(85); printGrade(95); printGrade(105); return 0; }
int main() { int input; do { printOptions(); scanf("%d", &input); switch(input) { case 1: inputGrade(); case 2: printGrade(); case 3: break; } } while(input != 3); return 0; }