关于c++友函数

显示全部楼层 · 2010-9-18 01:18:18

定义复数类，重载“
using namespace std;
class complex
{
public:
complex() {R=I=0;}
complex(double r) {R=r; I=0;}
complex(double r,double i) {R=r; I=i;}
double getR() {return R;}
double getI() {return I;}
void setR(double r) {R=r;}
void setI(double i) {i=i;}
complex operator =(complex ob) {R=ob.R; I=ob.I;}
complex operator +(complex ob);
complex operator -(complex ob);
complex operator *(complex ob);
complex operator /(complex ob);
friend ostream & operator =0.0)? "+" : "-" >的重载，（这里是友函数）的实现语句要跟定义放在一起。下面这样就可以了。#include#includeusing namespace std;class complex{public: complex() {R=I=0;} complex(double r) {R=r; I=0;} complex(double r,double i) {R=r; I=i;} double getR() {return R;} double getI() {return I;} void setR(double r) {R=r;} void setI(double

千问 · 2010-9-18 01:18:18

主要是编译器问题，VS2008以后的版本对C++标准支持的更好。这是输入输出流问题，ostream=0.0)? "+" : "-" << fab(ob.I) << "i";改成：return o