例3-3

#include<stdio.h> int main(void) {  int count,i,n;  double grade,total;

 printf("Enter n:");  scanf("%d",&n);  total=0;  count=0;  for(i=1;i<=n;i++){   printf("Enter grage#%d:",i);      scanf("%lf",&grade);   total=total+grade;   if(grade<60){    count++;   } } printf("Grade average=%.2f\n",total/n); printf("Number of failures=%d\n",count);      return 0; }