complex类加法，减法，乘法，除法运算，重载输出函数，运用友元函数，掌握类的声明和对象的定义；

观察构造函数和析构函数的执行过程；

学习使用Visual C++6.0的Debug调试功能，跟踪观察类的构造函数、析构函数、成员函数的执行顺序。-Complex kind of addition, subtraction, multiplication, and division, operation, an overloaded output function use friend yuan function, master class statement and object definition

The structures observed destructor function and the implementation of the process

Learn to use Visual C++ 6.0 Debug the commissioning function, tracking type s constructor, the destructor, members of the executive order () function.