C++重載運算符的幾類使用方法

1,非運算符重載實現(xiàn)復(fù)數(shù)的加法運算〃非運算符重載實現(xiàn)復(fù)數(shù)的加法運算//complex.h#include<iostream.h>#ifndefCOMPLEX_H#defineCOMPLEX_Hclasscomplex(public:complex();doublegetreal();doublegetimag();voidsetreal(double);voidsetimag(double);voiddisplay();private:doublereal;doubleimage;);#endif//complex,cpp#include<iostream,h>#include"complex.h"complex::complex()(real=0;image=0;)voidcomplex::setreal(doubler)(real=r;)voidcomplex::setimag(doublei)(image=i;)doublecomplex::getreal()(returnreal;)doublecomplex::getimag()(returnimage;)voidcomplex::display()(cout<<"theresultis\n"<<real<<"+i*("<<image<<')'<<endl;)//test.cpp#include<iostream.h>#include"complex.h"complexadd(complexcomp1,complexcomp2);complexsub(complexcomp1,complexcomp2);voidmain()(complexc1,c2,c3,c4;c1.setreal(2.0);c1.setimag(3.0);c2.setreal(1.0);c2.setimag(4.0);c3=add(c1,c2);cout<<"c3=c1+c2,";c3.display();c4=sub(c1,c2);cout<<"c4=c1-c2,";c4.display();)complexadd(complexcomp1,complexcomp2)(complextemp;temp.setreal(comp1.getreal()+comp2.getreal());temp.setimag(comp1.getimag()+comp2.getimag());returntemp;)complexsub(complexcomp1,complexcomp2)(complextemp;temp.setreal(comp1.getreal()-comp2.getreal());temp.setimag(comp1.getimag()-comp2.getimag());returntemp;).運算符重載作為類的成員函數(shù)//complex.h#include<iostream.h>#ifndefCOMPLEX_H#defineCOMPLEX_Hclasscomplex{public:complex(double=0.0,double=0.0);complexoperator+(constcomplex&);complexoperator-(constcomplex&);complex&complex::operator=(constcomplex&);voiddisplay();private:doublereal;doubleimage;};#endif//complex.cpp#include<iostream.h>#include"complex.h"complex::complex(doubler,doublei){real=r;image=i;}complexcomplex::operator+(constcomplex&c2)//定義重載運算符函數(shù){complexc;c.real=real+c2.real;c.image=image+c2.image;returnc;}complexcomplex::operator-(constcomplex&c2)//定義重載運算符函數(shù){complexc;c.real=real-c2.real;c.image=image-c2.image;returnc;}complex&complex::operator=(constcomplex&right){real=right.real;image=right.image;return*this;)voidcomplex::display()(cout<<"theresultis\n"<<real<<"+i*("<<image<<')'<<endl;)//test.cpp#include<iostream.h>#include"complex.h"doublemain()(complexc3,c4,c1(3.0,4.0),c2(5.0,1.0);cout<<"c1=";c1.display();cout<<"c2=";c2.display();c3=c1+c2;//運算符+用于復(fù)數(shù)運算cout<<"c1+c2="<<endl;c3.display();c4=c1-c2;//運算符+用于復(fù)數(shù)運算cout<<"c1-c2="<<endl;c4.display();return0;).運算符重載作為類的友元函數(shù)〃運算符重載作為類的友元函數(shù)//complex.h#include<iostream.h>#ifndefCOMPLEX_H#defineCOMPLEX_Hclasscomplex(friendcomplexoperator+(complex&c1,complex&c2);//重載函數(shù)作為類的友元函數(shù)friendcomplexoperator-(complex&c1,complex&c2);//重載函數(shù)作為類的友元函數(shù)public:complex(doubler=0.0,doublei=0.0);voiddisplay();private:doublereal;doubleimage;);#endif//complex.cpp#include<iostream.h>#include"complex.h"complex::complex(doubler,doublei)(real=r;image=i;)voidcomplex::display()(cout<<"theresultis"<<real<<"+i*("<<image<<')'<<endl;)complexoperator+(complex&c1,complex&c2)(complexc3;c3.real=c1.real+c2.real;c3.image=c1.image+c2.image;returnc3;)complexoperator-(complex&c1,complex&c2)(complexc3;c3.real=c1.real-c2.real;c3.image=c1.image-c2.image;returnc3;)//test.cpp#include<iostream.h>#include"complex.h"intmain()(complexc1(2.0,1,0),c2(1.0,3,0),c3,c4;cout<<"c1=";c1.display();cout<<"c2=";c2.display();c3=c1+c2;c4=c1-c2;c3.display();c4.display();return0;).運算符重載作為類的非成員非友元函數(shù)//運算符重載作為類的非成員非友元函數(shù)//complex.h#ifndefCOMPLEX_H#defineCOMPLEX_Hclasscomplex(public:complex();complex(double,double);voidsetreal(double);voidsetimag(double);doublegetreal()const;doublegetimag()const;voiddisplay();complex&operator=(constcomplex&);//等號運算符必須作為類的成員函數(shù)private:doublereal;doubleimage;};#endifcomplexoperator+(constcomplex&c1,constcomplex&c2);complexoperator-(constcomplex&c1,constcomplex&c2);//complex.cpp#include<iostream.h>#include"complex.h"complex::complex()(setreal(0);setimag(0);}complex::complex(doubler,doublei)(real=r;image=i;}voidcomplex::setreal(doubler)(real=r;}voidcomplex::setimag(doublei)(image=i;}doublecomplex::getreal()const(returnreal;)doublecomplex::getimag()const(returnimage;)voidcomplex::display()(cout<<"theresultis"<<real<<"+i*("<<image<<')'<<endl;)complexoperator+(constcomplex&c1,constcomplex&c2)(complexc3;c3.setreal(c1.getreal()+c2.getreal());c3.setimag(c1.getimag()+c2.getimag());returnc3;)complexoperator-(constcomplex&c1,constcomplex&c2)(complexc3;c3.setreal(c1.getreal()-c2.getreal());c3.setimag(c1.getimag()-c2.getimag());returnc3;)complex&comp