如上
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#include"stdio.h"
int main(void){
int a=0,b=0,c=0,d=0,e=0,f,i,grade[200];
printf("你要统计的人数:\n");
scanf("%d",&f);
for(i=0;i<f;i++)
scanf("%d",&grade[i]);
for(i=0;i<f;i++){
if(grade[i]>90) a++;
else if(grade[i]>=80) b++;
else if(grade[i]>=70) c++;
else if(grade[i]>=60) d++;
else e++;
}
printf("A级人数%d\nB级人数%d\nC级人数%d\nD级人数%d\nE级人数%d\n",a,b,c,d,e);
}