用qt实现一个简单的计算器，这个计算器有简单的加、减、乘、除，根号，简单三角函数的功能。-this function is for the calc ,have add sub mul div.sqrt

计算器，能实现简单的加减乘除运算。在MINIGUI下运行。用C语言开发的。-Calculator that can perform simple addition and subtraction multiplication and division operations. The MINIGUI run. Developed using C language.

简易计算器的实现。调用相应组件，完成组件布局，实现计算器的界面，完成相应的按键槽函数，利用信号槽机制实现按键事件与槽函数的相应。-The realization of a simple calculator. Call the appropriate components to complete the layout of components, calculator interface, complete the corresponding key slot function, signal