第四章例4-2

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

 num=0;
 total=0;
 count=0;
 printf("Enter grades:");
 scanf("%lf",&grade);

 while(grade>=0){
  total=total+grade;
  num++;
  if(grade<60)
   count++;
  scanf("%lf",&grade);
 }
 if(num!=0){
  printf("Grade average is %.2f\n",total/num);
  printf("Number of failures is %d\n",count);
 }
 else
  printf("Grade average is 0\n");

 return 0;
}

 

 

转载于:https://www.cnblogs.com/jiangjiali/p/3353509.html