91学习

#include <stdio.h>

void main(){

int grade[10]={1,2,3,4,5,6,7,8,9,10};

int total=0;

int i;

float avg;

for(i=0;i<10;i++){

total+=grade[i];

}

avg=((float)total/10);

printf("the student's average is %f\n",avg);

}