C++实现复数类和大整数类

用C++实现复数类以及大整数类，主要是练习C++的运算符重载等知识。

复数类：

主要实现构造，重载+-运算符。

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 
 4 class Complex {
 5 public:
 6     double real;
 7     double image;
 8     Complex(double r=2.0,double i=-2.0);
 9     Complex(const Complex& c);
10     
11     //一元运算符推荐不用友元 
12     Complex& operator += (const Complex& c);
13     Complex& operator -= (const Complex& c);
14     
15     //二元运算符推荐用友元 
16     friend bool operator == (const Complex& c1,const Complex& c2);
17     friend Complex operator + (const Complex& c1,const Complex& c2);
18     friend ostream& operator << (ostream& o,const Complex& c);
19 };
20 
21 Complex::Complex(double r,double i) : real(r),image(i) { }
22 Complex::Complex(const Complex& c) {
23     this->real=c.real;
24     this->image=c.image;
25 }
26 
27 Complex& Complex::operator +=(const Complex& c) {
28     this->real+=c.real;
29     this->image+=c.image;
30     return *this;
31 }
32 
33 Complex& Complex::operator -=(const Complex& c) {
34     this->real-=c.real;
35     this->image-=c.image;
36     return *this;
37 }
38 
39 bool operator == (const Complex& c1,const Complex& c2) {
40     return (c1.real==c2.real && c1.image==c2.image);
41 }
42 
43 Complex operator + (const Complex& c1,const Complex &c2) {
44     Complex ret(c1.real+c2.real,c1.image+c2.image);
45     return ret;
46 }
47 
48 ostream& operator << (ostream& o,const Complex& c) {
49     o<<c.real<<" "<<c.image<<endl;
50     return o; 
51 }
52 
53 int main()
54 {
55     Complex c1;
56     Complex c2(3.0,-3.0);
57     Complex c3=c1;
58     cout<<"c1:"<<c1<<"c2:"<<c2<<"c3:"<<c3;
59     cout<<"c1==c2 ? "<<(c1==c2)<<endl;
60     cout<<"c1==c3 ? "<<(c1==c3)<<endl;
61     cout<<"c1+c2 : "<<(c1+c2);
62     
63     c1+=c2;
64     cout<<"c1:"<<c1;
65     c1-=c3;
66     cout<<"c1:"<<c1;
67     return 0;
68 } 

View Code

大整数类：

1 #include<bits/stdc++.h>

View Code

参考资料：

大整数类：https://www.cnblogs.com/zhgyki/p/9579367.html