程序代码：

#include<stdio.h>
int main()
{
    int a,b,c;
    scanf("%d,%d,%d",&a,&b,&c);
    if(a>=b&&a>=c){if(b>=c)printf("a,b,c");else printf("a,c,b");}
    else if(b>=a&&b>=c){if(a>=c)printf("b,a,c");else printf("b,c,a");}
    else { if(a>=b)printf("c,a,b");else printf("c,b,a");}

    return 0;
}