本程序由Delphi开发一个计算器，是初学者参考的好例子，完善的功能除数不能为0、直接按“=”号产生的错误，小数点的定位，自动光标位置-A calculator program developed by Delphi, is a good example for beginners reference, and improve the function of the divisor can not be zero, " =" error, not the number of point pos