用栈实现算术表达式 一个小小的科学计算器，根据用户输入的表达式计算出结果-Arithmetic expressions using stacks to achieve a small scientific calculator, in accordance with user input to calculate the results of the expression

科学计算器。可以解读表达式，进行整数、浮点数的加减乘除运算。-Scientific calculator. Expression can be interpreted, for integer, floating-point addition and subtraction, multiplication and division calculations.

自己上大学时开发的有声科学计算器。 使用一个泛型二叉树深度优先进行表达式解析。 界面支持编辑表达式，声音是自己录的，不要害怕(-:< -The development of their own college, sound scientific calculator. Using a generic binary tree for the expression analysis. Interface supports editing expressions, his voice