编制计算N （N<50）个偶数之（2+4+6+…）的子程序和接收输入N及将结果（例如2+4+6=12）显示的主程序。

对键盘输入的字符进行判断，如果不是数字，显示提示，输入两位数。对输入的数字进行判断，如果输入的数不在1～50之间，提示重新输入。结束时，显示提示，按任意键退出。

在程序的开始显示自己的学号及姓名（拼音）。

编制一个主模块，编制一个子程序模块。实现参数的传递-Preparation of calculations N (N < 50) were even of the (2+4+6+ ...) subroutine and receive input N and the results (eg 2+4+6 = 12) shows the main program. Characters on the keyboard to judge, if not a number, indicating prompt, enter the double digits. Be judged on the number of input, if the number entered is not between 1 to 50, indicating again. The end of the show prompted, press any key to exit. In the process of starting to show their student number and name (Pinyin). The preparation of a main module, the preparation of a subroutine module. Transmission parameters to achieve