设计、定义并实现Complex类

设计、定义并实现Complex类

#include <iostream> 
#include <cmath>
using namespace std;
class Complex{
    public:
        Complex(double real0,double imaginary0);
        Complex(double real0);
        Complex(Complex &a);
        void add(Complex b);
        void show();
        double mod();
    private:
        double real;
        double imaginary; 
        
};
Complex::Complex(double real0,double imaginary0):real(real0),imaginary(imaginary0){
}
Complex::Complex(double real0):real(real0){
}
Complex::Complex(Complex &a):real(a.real),imaginary(a.imaginary){
}
void Complex::add(Complex b){
    real=real+b.real;
    imaginary=imaginary+b.imaginary;
}
void Complex::show(){
    cout<<real<<"+"<<imaginary<<"i"<<endl;
}
double Complex::mod(){
    double m;
    m=sqrt(real*real+imaginary*imaginary);
    return m;
}
int main()
{ Complex c1(3,5);
  Complex c2(4.5);
  Complex c3(c1);
  c1.add(c2);
  c1.show();
  cout<<c1.mod()<<endl;
  return 0;
}

#include <iostream> 
#include <cmath>
using namespace std;
class Complex{
    public:
        Complex(const double real0=0,const double imaginary0=0);
        Complex(const Complex &a);
        void add(Complex b);
        void show();
        double mod();
    private:
        double real;
        double imaginary; 
        
};
Complex::Complex(const double real0,const double imaginary0):real(real0),imaginary(imaginary0){
}
Complex::Complex(const Complex &a):real(a.real),imaginary(a.imaginary){
}
void Complex::add(Complex b){
    real=real+b.real;
    imaginary=imaginary+b.imaginary;
}
void Complex::show(){
    cout<<real<<"+"<<imaginary<<"i"<<endl;
}
double Complex::mod(){
    double m;
    m=sqrt(real*real+imaginary*imaginary);
    return m;
}
int main()
{ Complex c1(3,5);
  Complex c2=4.5;
  Complex c3(c1);
  c1.add(c2);
  c1.show();
  cout<<c1.mod()<<endl;
  return 0;
}

小结

• 程序中原题“Complex c2=4.5”在程序中报错，光标定位于“=”，但是把等号改成括号就可以执行程序了。不知原因，请大佬指点。
• 自己还是对知识不熟悉，一开始无从下手，花太多时间思考，在编程过程中屡次出现错误，譬如基本程序的实现，误使用中文状态下的符号，单词拼错等。需要花时间来修改及完善。光说不练假把式，还是要多实践，多练习。
• 根据老师讲的内容重新修改了，但仍对const的用法及意义不了解。

评论

https://www.cnblogs.com/lovecpp/p/10629186.html

https://www.cnblogs.com/jiyuanxiangzhouziying/p/10630503.html#4227461

https://www.cnblogs.com/linjiahao1035/p/10638234.html