标准C + +的iostream库的颜色不知道。因此，控制台应用程序往往显得很枯燥，往往不能强调的重要文本洪水位。正如我通常使用控制台应用程序做单元测试，我想输入的测试案例中脱颖而出的条件和结果，并很容易解释（即通过绿色和失败红色）。

-The standard C++ iostream library does not know about colors. Hence, console applications tend to look very boring and often fail to emphasize the important bits in the flood of text. As I normally use console applications to do unit testing, I wanted the input conditions and the results of the test cases to stand out and be easily interpreted (i.e. PASSED in green and FAIL in red).