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#2
rjsp2013-02-01 08:36
最好不要起名为 complex，因为C++标准库中已经有一个std::complex了
 程序代码：#include <iostream> class dbl_complex { public: dbl_complex( double real=0.0, double image=0.0 ) : real_(real),image_(image) { } operator double() const { return real_; } friend dbl_complex operator+( const dbl_complex& a, const dbl_complex& b ); friend std::ostream& operator<<( std::ostream&, const dbl_complex& ); private: double real_; double image_; }; inline dbl_complex operator+( const dbl_complex& a, const dbl_complex& b ) { return dbl_complex( a.real_+b.real_, a.image_+b.image_ ); } std::ostream& operator <<( std::ostream &os, const dbl_complex& c ) { return os << c.real_ << '+' << c.image_ << 'i'; } using namespace std; int main() { dbl_complex c1(1,2), c2(2,3); dbl_complex c3 = c1 + c2; cout << c3 << endl; cout << c1+c2 << endl; return 0; } |
编写一个程序实现复数的相加功能，并且可以把复数转化为双精度浮点数进行运算。。下面是我写的代码但是没法运行。。
#include<iostream>
using namespace std;
class complex
{
public:
complex(){real=0;image=0;}
complex(double real,double image):real(r),image(i){}
complex(double r){real=r;image=0;}
operator double(){return real;}
friend complex operator +(complex &c1,complex &c2);
friend ostream & operator <<(ostream&,complex&);
void display();
private:
double real;
double image;
};
complex operator +(complex &c1,complex &c2)
{
return(c1.real+c2.real,c1.image+c2.image);
}
ostream& operator <<(ostream &output,complex &c)
{
output<<c.real<<"+"<<c.image<<"i"<<endl;
return output;
}
void complex::display()
{
cout<<c.real<<c.image<<endl;
}
int main()
{
complex c1(1,2),c2(2,3),c3;
double c4;
c3=c1+c2;
cout<<c3;
c4=c1+c2;
cout<<c4;
return 0;
}
