A - ASCII码排序

#include<stdio.h>
int main()
{
    char a,b,c,t;
    while(scanf("%c%c%c",&a,&b,&c)!=EOF)
    {
        getchar();
        if(a>b)
        {t=a;a=b;b=t;}
        if(a>c)
        {t=a;a=c;c=t;}
        if(b>c)
        {t=b;b=c;c=t;}
        printf("%c %c %c\n",a,b,c);
    }
    return 0;
}