image.png

    1. //.h
    4. #ifndef CPPSTUDY_DEMO7_1_COMPLEX_H
    5. #define CPPSTUDY_DEMO7_1_COMPLEX_H
    7. #include <iostream>
    8. using namespace std;
    10. class demo7_1_Complex {
    12. public:
    13.     demo7_1_Complex();  //构造函数 实体创建的时候自动调用
    14.     demo7_1_Complex(double r, double i);//构造函数
    15.     virtual ~demo7_1_Complex();   //析构函数 实体销毁时候自动调用
    16.     demo7_1_Complex(const demo7_1_Complex &x); //拷贝构造函数
    18.     //get set
    19.     double real() const { return _real; }
    21.     void real(double d) { _real = d; }
    23.     void image(double i) { _image = i; }
    25.     double image() const { return _image; }
    27.     //运算符重载
    28.     demo7_1_Complex operator+(const demo7_1_Complex &x);  //+
    29.     demo7_1_Complex& operator=(const demo7_1_Complex &x);  //=
    31.     demo7_1_Complex &operator++();    //前置++
    32.     demo7_1_Complex operator++(int);  //后置++
    34. //protected:
    35. //friend
    37.     friend ostream& operator<<(ostream& os, const demo7_1_Complex &x);
    38.     friend istream& operator>>(istream& is, demo7_1_Complex &x);
    40. private:
    41.     double _real;
    42.     double _image;
    44. };
    47. #endif //CPPSTUDY_DEMO7_1_COMPLEX_H
    49. //.c
    50. #include "demo7_1_Complex.h"
    52. demo7_1_Complex::demo7_1_Complex() {
    53.     _real = 0;
    54.     _image = 0;
    55.     cout << "demo7_1_Complex()" << endl;
    56. }
    58. demo7_1_Complex::demo7_1_Complex(double r, double i) {
    59.     _real = r;
    60.     _image = i;
    61.     cout << "demo7_1_Complex(double r, double i)" << endl;
    62. }
    64. demo7_1_Complex::~demo7_1_Complex() {
    65.     cout << "~demo7_1_Complex()" << endl;
    66. }
    68. demo7_1_Complex::demo7_1_Complex(const demo7_1_Complex &x) {
    69.     _real = x._real;
    70.     _image = x._image;
    71.     cout << "demo7_1_Complex(const demo7_1_Complex &x)" << endl;
    72. }
    74. demo7_1_Complex demo7_1_Complex::operator+(const demo7_1_Complex &x) {
    76.     demo7_1_Complex tmp;
    77.     tmp._real = _real + x._real;
    78.     tmp._image = _image + x._image;
    80.     cout << "+" << endl;
    82. //    return demo7_1_Complex(_real + x._real, _image + x._image);
    83.     return tmp;
    84. }
    86. demo7_1_Complex& demo7_1_Complex::operator=(const demo7_1_Complex &x) {
    87.     _real = x._real;
    88.     _image= x._image;
    90.     cout << "=" << endl;
    92.     return *this;
    93. }
    95. demo7_1_Complex& demo7_1_Complex::operator++() {     //前置++
    96.     _real++;
    97.     _image++;
    98.     return *this;
    99. }
    101. demo7_1_Complex demo7_1_Complex::operator++(int) {  //后置++
    102.     demo7_1_Complex tmp(*this);
    103.     _real++;
    104.     _image++;
    105.     return tmp;
    106. }
    108. ostream& operator<<(ostream& os, const demo7_1_Complex &x){
    110.     os << "real value is:" << x._real << " image value is:" << x._image;
    112.     return os;
    114. }
    116. istream& operator>>(istream& is, demo7_1_Complex &x){
    117.     is >> x._real >> x._image;
    118. }