编一程序，输入三个变量，按值从大到小输出。

#include<stdio.h>
int main(void)
{ int a=0,b=0,c=0,s=0;
printf("input:");
scanf("%d%d%d",&a,&b,&c);
if(a<b) {s=a;a=b;b=s;}
if(a<c) {s=a;a=c;c=s;}
if(b<c) {s=b;b=c;c=s;}
printf("%d,%d,%d\n",a,b,c);
return 0;
}

#!/usr/bin/env python
#coding=utf-8
#filename=2-15b

#元素排序，从大到小，不使用列表或排序算法

a = int(raw_input('enter number:'))
b = int(raw_input('enter number:'))
c = int(raw_input('enter number:'))

if a > b and b > c:
print '%d>%d>%d' % (a,b,c)
elif a > b and b < c and a > c:
print '%d>%d>%d' % (a,c,b)
elif a > b and b < c and a < c:
print '%d>%d>%d' % (c,a,b)
elif a < b and b < c:
print '%d>%d>%d' % (c,b,a)
elif a < b and b > c and a < c: