第七周任务（3）第二种算法

#include <iostream>  #include <cmath>  using namespace std;  template <class numtype>  class Comple  {  private:       numtype real;       numtype imag;  public:      Comple(){real = 0;imag = 0;}      Comple(numtype r,numtype i){real = r;imag = i;}  Comple add(Comple &c2) ;     Comple  subtract(Comple &c2);          Comple   multiply(Comple &c2);          Comple   divide(Comple &c2);         void  display() ;     };  template <class numtype>Comple<numtype>  Comple<numtype>::add(Comple &c2)      {          Comple c;          c.real=real+c2.real;          c.imag=imag+c2.imag;          return c;      }template <class numtype>Comple<numtype>  Comple<numtype>:: subtract(Comple &c2)      {          Comple c;          c.real=real-c2.real;          c.imag=imag-c2.imag;          return c;      } template <class numtype>Comple<numtype>  Comple<numtype>:: multiply(Comple &c2)      {          Comple c;          c.real=real*c2.real;          c.imag=imag*c2.imag;          return c;      }  template <class numtype>  Comple<numtype>  Comple<numtype>:: divide(Comple &c2)      {          Comple c;          c.real=real/c2.real;          c.imag=imag/c2.imag;          return c;      } template <class numtype>void  Comple<numtype>::display()      {      cout<<"("<<real<<","<<imag<<"i)"<<endl;      }  int main()  {   Comple<int> c1(3,4);      Comple<int>c2(5,-10);      Comple<int>c3;        c3=c1.add(c2);        cout<<"c1+c2=";       c3.display( );         c3=c1.subtract(c2);        cout<<"c1-c2=";       c3.display( );         c3=c1.multiply(c2);        cout<<"c1*c2=";       c3.display( );         c3=c1.divid(c2)       cout<<"c1/c2=";       c3.display( );         Comple<double> c4(3.1,4.4);      Comple<double>c5(5.34,-10.21);      Comple<double>c6;        c6=c4.add(c5);        cout<<"c4+c5=";      c6.display( );         system("pause");      return 0;  }