# include <stdio.h>
void main ()
{
    int i,sum1,sum2,a[9];
    sum1=0;
    sum2=0;
    for(i=0;i<=8;i++)
    {
        scanf("%d",&a[i]);
    if(i%4==0)
        sum1=sum1+a[i];
    if(i%2==0 && i>0 && i<8)
        sum2=sum2+a[i];
    }
for(i=0;i<=8;i++)
{
 printf("%d,",a[i]);
 if(i%3==2)
        printf("\n");
}
    printf("sum1=%d\n",sum1);
    printf("sum2=%d\n",sum2);
}
昨天晚上电脑出了点故障，今天刚运行程序！

呵呵，真不错！！！

嘻嘻~谢谢认可~大家一起学习c!