#include <stdio.h>
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);
}
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