11[分析题]
#include <iostream.h>cass complex{  private:    double real, image;    complex( )     { real =0.0;image=0.0;}complex(double r, double i)      { real =r; image=i; }void print(){cout<<real<<’ ’<<image<<’i’<<endl;}friend complex operator (complex col ,complex co2);}; complex operator (complex col ,complex co2)  {      complex temp;      temp.real=col.real co2.real;      temp.imag=col.imag co2.imag;      return temp;}main(){  complex c1(1.1,2.2), c2(3.3,4.4), sum;  c1.print();  sum=c1 c2; sum.print();}