用%*c滤掉回车，ASCII码排序

#include <stdio.h>

int main()
{
    char a,b,c,tmp;
    while((a=getchar())!=EOF)
    {
        b=getchar();
        c=getchar();
        getchar();    //在录入c后用getchar()滤掉回车
        if(a>b)
        {
            tmp=a;
            a=b;
            b=tmp;
        }
        if(a>c)
        {
            tmp=a;
            a=c;
            c=tmp;
        }
        if(b>c)
        {
            tmp=b;
            b=c;
            c=tmp;
        }
        printf("%c %c %c\n",a,b,c);
    }
    return 0;
}