计算学生们的平均成绩,并统计优秀(成绩不低于90分)的比率。
#include <stdio.h>
int main()
{
int sum=0,count=0,N;
int a[N];
float average,rate;
scanf("%d\n",&N);
for(int i=0;i<N;i++)
{
scanf("%d",&a[i]);
sum+=a[i];
if(a[i]>=90) count++;
}
average=sum/N;
//printf("%d",count);
rate=count/N;
if(N != 0)
average = sum / N;
else
average = 0;
printf("average=%.2f\n",average);
printf("rate=%.2f",rate);
return 0;
}