complex complex operator+ complex c2)∥重载函数实现 complex C) c real=c2. real+real Cimag=c2 imag+imag return complex(c real, C imag);complex complex:: operator +(complex c2) //重载函数实现 { complex c; c.real=c2.real+real; c.imag=c2.imag+imag; return complex(c.real,c.imag); }