#includevoid main(){int a,b,c,t;printf("请输入三个整数:a b c\n");scanf("%d%d%d",&a,&b,&c);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("排序后的三个整数为:%d,%d,%d\n",a,b,c);}如果你输入的要求不是整数,你只要把定义和%d改一下就好。