第三章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 grade#%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;
}