用来显示对应数字的条形码。共6种码制，可以选择打印大小，打印位置，也可以打印预览，不过暂时还不具备连接打印机打印功能，这个可以自己添加上去。-Used to display the corresponding bar code numbers. A total of six kinds of system code, you can choose print size and print position, you can print preview, but not yet connected

用C++打印边形，并且6条边都相等， 打印出的结果为：六边形-Using C++ to print edge-shaped, and the six sides are equal, print out the results: hexagonal

歌德巴赫猜想,任何一个大于六的偶数可以拆分成两个质数的和 打印出所有的可能 //任何一个大于六的偶数可以拆分成两个质数的和 //打印出所有的可能 -Goldbach conjecture, any even number greater than six can be split into two prime numbers and print out all possible// any even number greater than six can be split