大数运算，加减乘除，但是没有实现小数计算功能，MFC，限制键盘输入，取消就可以-Operation of large numbers, addition, subtraction, but does not implement decimal calculations, MFC, limited keyboard input, you can cancel

计算大数阶乘,采用MFC进行编程,可以作为学生学习MFC的范例小程序-Calculate the factorial of large numbers, using MFC programming, can be used as an example of student learning MFC applet

大数计算，调用medlts库，进行计算大数(MELTS software is now open source! Go to Gitlab for details. Try the MELTS web services. rhyolite-MELTS not working correctly after an upgrade? See this support document. Download the MELTS for Excel workbook. Get MagmaSat a