编写一个简单的计算机程序，实现两个实数的四则运算。数据由文本字段读入，运算符通过按钮选择，结果由一个不可以编辑的文本字段显示-Write a simple computer program to achieve two of the four fundamental operations of real numbers. The data read from the text fields, operator push-button selection, the results can not be edited by a text field displays