C-Free中能编译运行，pta中报错

include<stdio.h>
int main()
{
    int a,ge,shi,bai,qian,;
    scanf("%d",&a);
    ge=a%10;
    shi=a/10%10;
    bai=a/10/10%10;
    qian=a/1000;
    printf("%d",ge+shi+bai+qian);
    return 0;
}

这个逗号去掉试试