ทำต่อด้วยไอสัส Average

#include <stdio.h>

    typedef struct{
        char name[30];
        int test[5];
    }student;

void find_avg(student st[]){
    int i,j,sum;
    double avg;
    for (i=0;i<2;i++){
            sum=0;
            for (j=0;j<5;j++){
                sum=sum+st[i].test[j];
            }
    avg = sum/5.0;
    printf("\n Average of Student %d = %.2lf",i+1,avg);
        }
}

void main(){
    student st[5];
    int i,j;
    for (i=0;i<2;i++){
        printf("Enter name [%d] : ",i+1);
        scanf("%s",st[i].name);

        for (j=1;j<=5;j++){
            printf("Score [%d] :",j+1);
            scanf("%d",&st[i].test[j]);
        }

    }
    find_avg(st);
}