![](http://images0.cnblogs.com/blog/570011/201310/07112011-6394fa760b0f41adaf2d7778e6adc498.png)
#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("%If",&grade); total=total+grade; if(grade<60){ count++; } } printf("Grade average=%.2f\n",total/n); printf("Number of failures=%d\n",count); return 0; }