基于跨平台图形化界面开发框架Qt设计的简单四则算术能力测试的小程序，可以输入题目的数目，随机出题，在给出答案并提交后给出测试分数。-Four simple applet-based cross-platform development fr a mework Qt graphical interface designed to test the ability of arithmetic, you can enter the number of topics, random questions,