通过建立头文件，在源程序中来调用头文件，实现类的功能，此程序主要是对构造函数的运用加以说明，通过一个简单的例子，明白构造函数的用法-Through the establishment of header files, source Tseng to call in the header file, implementation class features, this procedure is illustrated for use constructor, through a simple example to understand the usage constructor function