编辑代码

#include <stdio.h>
int main ()
{   float a,b,c,t;
    printf("请输入三个数:");
    scanf("%f,%f,%f",&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("从大到小:%5.2f,%5.2f,%5.2f\n",a,b,c);
	return 0;
}