Xcode开发的简单计算器，实现基本的功能-Xcode development of a simple calculator for basic function

一个简单的计算器，是在Xcode上实现，用Objective-C编译。-A simple calculator is in Xcode to achieve, in Objective-C compiler.

一个MacOSX下的计算器实现，功能很简单。可供初学者参考。 http://www.oschina.net/code/snippet_107536_8434-A calculator MacOSX under implementation, the functionality is very simple. The reference for beginners. http://www.oschina.net/code/snippet_107536_8434

基于Object-C的简单计算器的实现，采用XCODE框架制作-a simple calculator