Python 练习实例47

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题目:两个变量值互换。

程序分析:

程序源代码:

#!/usr/bin/python # -*- coding: UTF-8 -*- 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)

以上实例输出结果为:

x = 10,y = 20
x = 20,y = 10

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