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# Untitled

a guest Apr 16th, 2018 59 Never
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1. #include <iostream>
2. using namespace std;
3.
4. class Complex {
5. private:
6.     double re, im;
7. public:
8.     // ham tao thiet lap tu hai so
9.     Complex(double r = 0, double i = 0) : re(r) , im(i) { }
10.     // ham copy tu mot so phuc
11.     Complex (Complex &C): re(C.re), im(C.im) { }
12. public:
13.     Complex operator + (Complex c);
14.     Complex operator - (Complex c);
15.     Complex operator * (Complex c);
16.     Complex operator / (Complex c);
17. public:
18.     friend ostream& operator << (ostream& out, Complex &C) {
19.         return (out << '(' << C.re << ", " << C.im << "i) " );
20.     }
21. };
22. // Thiet ke cac toan tu cong, tru, nhan, chia
23. Complex Complex:: operator + (Complex C)
24. {
25.     return Complex(this->re + C.re, this -> im + C.im );
26. }
27. Complex Complex:: operator - (Complex C)
28. {
29.     return Complex(this -> re  C.re, this -> im - C.im );
30. }
31. Complex Complex:: operator * (Complex C)
32. {
33.     return Complex(this -> re * C.re - this -> im * C.im, this -> re * C.im + this -> im * C.re);
34. }
35. Complex Complex:: operator / (Complex C)
36. {
37.     return Complex((this -> re * C.re + this -> im * C.im)/(this -> re * this -> re + this -> im * this -> im), (this->re * C.im - this->im * C.re)/(this -> re * this -> re + this -> im * this -> im));
38. }
39.
40. int main() {
41.     // khai bao bien
42.     double a = 2, y, z;
43.     y = Complex::Complex(1,2);
44.     z = Complex::Complex(0,6);
45.     // tinh thu
46.     cout << y << " + " << z << = << y + z + a << endl;
47.     cout << y << " - " << z << = << y - z << endl;
48.     cout << y << " * " << z << = << y * z << endl;
49.     cout << y << " / " << z << = << y / z << endl;
50.     system("pause");
51.     return 0;
52. }
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