上QQ阅读APP看书，第一时间看更新
Running the program
Let's take a look at the effects and see if this is working as expected. So, give it a go in your browser. Click on the Exchange and Compare button. The results are shown in Figure 2.2.4:
Figure 2.2.4: Results of the initial program run
As you can see, x is 25 and y is 34. Then, after you click on Exchange and Compare, x is 34 and y is 25. So, this is working as expected.