So in general, when you're running command line programs, they can take input or arguments or parameters or switches or flags.
一般而言,当你运行命令行程序时,可以把把这些当做输入,像什么参数啊,或开关啊,或标志啊等等。
What I don't want your program to do is crash when that happens. Or run forever.
当这种问题出现时程序崩溃,或者一直运行下去。
This code does swap the two values, A and B. However, when I run this program, something happens.
这个代码没有交换那两个值,A和B,但是,当我运行这个程序时,有些事情发生了。
And when I ran that it, I got weird results, 300 because we know that a Google priced at, say, 300, is much more likely to move by 10 points in a day than a stock that's priced at $0.50.
当运行这个程序的时我得到很奇怪的答案,因为我们知道一只谷歌的股价大概是,对一个0。5美元的股票来讲,每天改变10个点才比较正常。
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