c语言数组应用

#include <stdio.h>
#define SIZE 5

int main(void)
{
    int sum[3]={0},sum2[SIZE]={0},i,sum1=0;
    double average2[SIZE]={0},average[3]={0},average1=0;
    //输入科目的成绩
    int math[SIZE]={91,67,88,78,81};
    int physics[SIZE]={87,79,81,86,67};
    int programming[SIZE]={86,81,85,92,87};
    //计算各个科目总分,各位同学总分，平均分数
    for (i=0; i<SIZE; i++)
    {
        sum[0]+=math[i];
        sum[1]+=physics[i];
        sum[2]+=programming[i];
        sum2[i]+=(math[i]+physics[i]+programming[i]);
        average2[i]=sum2[i]/3.0;
    }
    for (i=0; i<SIZE; i++)
    {
    printf("各位同学总分：%d\n",sum2[i]);
    }
    for (i=0; i<SIZE; i++)
    {
    printf("各位同学的平均分:%lf\n",average2[i]);
    }
    //计算各个科目平均分，全部课程总分，平均分
    for (i=0; i<=2; i++)
    {
        average[i]=sum[i]/5.0;
        sum1+=sum[i];
        average1=sum1/3.0;
    }
    for (i=0; i<=2; i++)
    {
        printf("各个科目总分：%d\n",sum[i]);
    }
    for (i=0; i<=2; i++)
    {
        printf("各个科目平均分：%lf\n",average[i]);
    }
    printf("全部课程总分：%d\n",sum1);
    printf("全部课程平均分：%lf\n",average1);
}