c语言编辑的简易计算器，可以用该程序实现简单的加减乘除计算，简便快捷，提高运算速度-c language editor of the simple calculator, you can use the program calculate simple addition and subtraction, multiplication and division, simple and efficient, improve processing speed

一个简易的计算器，只要可以实现加减乘除四种简单算法，包括可以利用负数进行计算，颜色是自己设定的，界面一般-A simple calculator can add, subtract, multiply and divide four simple algorithms, including the ability to use a negative number to calculate the color is set, the interface in general

简易计算器，实现加减乘除和三角函数的功能-Simple calculators, arithmetic and trigonometric functions