struct?Student{int?id;char?name[20];?float?score;};
void?main(){
struct?Student?students[100];
int?sum?=?0,?i?=?0;
for(i?=?0;?i?<?100;?i?++){
printf("%d,%c\n",?students[i].id,?students[i].name);
sum?+=?students[i].score;
}
printf("average?=?%f\n",?sum/100.0f);
}