# -*- coding: UTF-8 -*-
'''
题目:宏#define命令练习(2)
1.程序分析:
2.程序源代码:
#include "stdio.h"
#define exchange(a,b) { \ /*宏定义中允许包含两道衣裳命令的情形,此时必须在最右边加上"\"*/
int t;\
t=a;\
a=b;\
b=t;\
}'
这个宏定义python不支持
'''
def exchange(a,b):
a,b = b,a
return (a,b)
if __name__ == '__main__':
x = 10
y = 20
print ('x = %d,y = %d' % (x,y))
x,y = exchange(x,y)
print ('x = %d,y = %d' % (x,y))
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