C语言数组与函数问题

纯小白求大佬指教！

定义一个学生结构，再定义结构数组，用循环输入成绩的统计计算总成绩，再进行排序输出

#include <stdio.h>
typedef struct _student
{
    char name[20];
    int score[3];
    int sum;
    int avg;
}student;
int main()
{
    student s[36],temp;
    int i,j,t;
    for(i=0;i<36;i++)
    {
        scanf("%s",s[i].name);
        s[i].sum = 0;
        for(j=0;j<3;j++)
        {
            scanf("%d",&s[i].score[j]);
            s[i].sum += s[i].score[j];
        }
        s[i].avg = s[i].sum/3;
    }
    for(i=0;i<35;i++)
        for(j=0;j<35-i;j++)
        {
            if(s[j].sum < s[j+1].sum)
            {
                 temp = s[j];
                 s[j] = s[j+1];
                s[j+1] = temp;
            }
        }
    printf("%-10s%-25s%-10s%-10s%-10s%-10s%-10s\n","排序","姓名","课1","课2","课3","总分","平均分");
    for(i=0;i<36;i++)
    {
        printf("%-10d%-25s",i+1,s[i].name);
        for(j=0;j<3;j++)
            printf("%-10d",s[i].score[j]);
        printf("%-10d%-10d\n",s[i].sum,s[i].avg);
    }
    return 0;
}