、定义一个复数类complex，在类中包含两个数据成员，即复数的实数部分real和复数的虚数部分image。在类中定义几个必须的成员函数，再用友元来重载+，-，*，/四种运算符实现复数的四种运算。-, Define a complex type of complex, in the category of data consists of two members, namely, the real part of complex real and the imaginary part of th

U8单据插件，用于二次开发，利用单据控件实现-U8 document plug-in for the second development, the use of controls to achieve documents