#include<stdio.h>
int main( )
{
int n,i,grade;
double sum=0,average,rate,count=0;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
scanf("%d",&grade);
if(grade>=90)
count++;
sum+=grade;
}
average=sum/(n*1.0);
rate=(count*1.0)/(n*1.0);
printf("average=%.2lf\nrate=%.2lf",average,rate);
return 0;
}
PTA asks students for average scores and excellence rate answers
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Origin blog.csdn.net/kgb2333/article/details/134318327
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