桌面好用的计算器，类C指令，有常用的数值计算，超强的图形显示，比matlab使用简捷方便。-handy desktop calculator, a class C guidelines, it is commonly used in numerical calculation, super graphics, the use of Matlab than simple convenience.

《数据结构与程序设计》第一个例子，一个简单的桌面计算器，用到逆波兰计算-The data structure and program design "the first example, a simple desktop calculator, use the inverse Poland calculation