[语言过关]交换变量

<p style="font-family:'Microsoft Yahei';font-size:14px;background-color:#F5F5F5;"> 输入两个整数a和b，试交换a和b的值(长整型范围内) </p> <h3 style="font-family:'Microsoft Yahei';background-color:#F5F5F5;"> 输入格式 </h3> <p style="font-family:'Microsoft Yahei';font-size:14px;background-color:#F5F5F5;"> 输入数据只有一行为两个整数，两数之间用一个空格隔开，分别是a和b的值 </p> <h3 style="font-family:'Microsoft Yahei';background-color:#F5F5F5;"> 输出 </h3> <p style="font-family:'Microsoft Yahei';font-size:14px;background-color:#F5F5F5;"> 输出一行，为交换后a和b的值 </p> <h3 style="font-family:'Microsoft Yahei';background-color:#F5F5F5;"> 样例输入 </h3> <p style="font-family:'Microsoft Yahei';font-size:14px;background-color:#F5F5F5;"> <span style="font-family:'Lucida Console';">12&nbsp;36</span> </p> <h3 style="font-family:'Microsoft Yahei';background-color:#F5F5F5;"> 样例输出 </h3> <p style="font-family:'Microsoft Yahei';font-size:14px;background-color:#F5F5F5;"> <span style="font-family:'Lucida Console';">36&nbsp;12</span> </p>