c利用堆栈方法编写计算器可，实现小数的加、减、乘、除运算功能，并可进行行编辑功能（#表示退格，@表示退行）和括号匹配检验。-c using the method of preparation of the calculator stack can achieve decimal add, subtract, multiply, divide arithmetic functions, and can be line editing (# represents backspace, @ indic