C++ 复数四则运算

Posted on 2019-07-08 21:02  金色的省略号  阅读(387)  评论(0)  编辑  收藏  举报 
 1 #include <iostream>
 2 #include <cstdlib>
 3 #include <limits>
 4 using namespace std;
 5 
 6 class MyComplex{
 7 
 8     double a;
 9     double b;
10 
11 public:
12 
13     MyComplex(double a = 0.0, double b = 0.0){
14         this->a = a;
15         this->b = b;
16     }
17 
18     MyComplex operator+(const MyComplex& mc);
19     MyComplex operator-(const MyComplex& mc);
20     MyComplex operator*(const MyComplex& mc);
21     MyComplex operator/(const MyComplex& mc);
22     /* 重载<< , const不能少，否则会出错 */
23     friend ostream& operator<<(ostream &stream, const MyComplex& mc);
24     friend istream& operator>>(istream &stream, MyComplex& mc);
25 
26 };
27 
28 ostream& operator <<(ostream &stream, const MyComplex& mc){
29     stream << "(" << mc.a;
30     stream.setf(std::ios::showpos);
31     stream << mc.b << "i)";
32     stream.unsetf(std::ios::showpos);
33     return stream;
34 }
35 
36 istream& operator>>(istream &stream, MyComplex& mc){
37     stream >> mc.a >> mc.b;
38     return stream;
39 }
40 
41 MyComplex MyComplex::operator+(const MyComplex& mc){
42     MyComplex temp;
43     temp.a = a + mc.a;
44     temp.b = b + mc.b;
45     return temp;
46 }
47 
48 MyComplex MyComplex::operator-(const MyComplex& mc){
49     MyComplex temp;
50     temp.a = a - mc.a;
51     temp.b = b - mc.b;
52     return temp;
53 }
54 
55 MyComplex MyComplex::operator*(const MyComplex& mc){
56     MyComplex temp;
57     temp.a = a * mc.a - b*mc.b;
58     temp.b = b * mc.a + a*mc.b;
59     return temp;
60 }
61 
62 MyComplex MyComplex::operator/(const MyComplex& mc){
63     if ((mc.a == 0) && (mc.b == 0)) {
64         cout << "Divisor can not be 0";
65         exit(0);
66     }
67     MyComplex temp;
68     temp.a = (a*mc.a + b*mc.b) / (mc.a*mc.a + mc.b*mc.b);
69     temp.b = (b*mc.a - a*mc.b) / (mc.a*mc.a + mc.b*mc.b);
70     return temp;
71 }
72 
73 int main() {
74     MyComplex z1, z2;
75     cin >> z1;
76     cin >> z2;
77     cout << "z1 + z2 = "      << z1 + z2      << endl;
78     cout << "z1 - z2 + z1 = " << z1 - z2 + z1 << endl;
79     cout << "z1 * z2 - z1 = " << z1 * z2 - z1 << endl;
80     cout << "z1 / z2 + z1 = " << z1 / z2 + z1 << endl;
81     cout << "z2 - z1 / z1 = " << z2 - z1 / z1;
82     // GCC及VC编译器在调试模式下会暂停，便于查看运行结果
83 #if ( defined(__DEBUG__) || defined(_DEBUG) )
84     cin.ignore(numeric_limits<streamsize>::max(), '\n');
85     cin.get();
86 #endif
87     return 0;
88 }

 

 1 #include <iostream>
 2 #include <exception>
 3 #include <limits>
 4 #include <stdexcept> /*'runtime_error' was not declared in this scope*/
 5 using namespace std;
 6 
 7 class MyComplex{
 8 
 9     double a;
10     double b;
11 
12 public:
13 
14     MyComplex(double a = 0.0, double b = 0.0){
15         this->a = a;
16         this->b = b;
17     }
18 
19     MyComplex operator+(const MyComplex& mc);
20     MyComplex operator-(const MyComplex& mc);
21     MyComplex operator*(const MyComplex& mc);
22     MyComplex operator/(const MyComplex& mc);
23     /* 重载<< , const不能少，否则会出错 */
24     friend ostream& operator<<(ostream &stream, const MyComplex& mc);
25     friend istream& operator>>(istream &stream, MyComplex& mc);
26 
27 };
28 
29 ostream& operator <<(ostream &stream, const MyComplex& mc){
30     stream << "(" << mc.a;
31     stream.setf(std::ios::showpos);
32     stream << mc.b << "i)";
33     stream.unsetf(std::ios::showpos);
34     return stream;
35 }
36 
37 istream& operator>>(istream &stream, MyComplex& mc){
38     stream >> mc.a >> mc.b;
39     return stream;
40 }
41 
42 MyComplex MyComplex::operator+(const MyComplex& mc){
43     MyComplex temp;
44     temp.a = a + mc.a;
45     temp.b = b + mc.b;
46     return temp;
47 }
48 
49 MyComplex MyComplex::operator-(const MyComplex& mc){
50     MyComplex temp;
51     temp.a = a - mc.a;
52     temp.b = b - mc.b;
53     return temp;
54 }
55 
56 MyComplex MyComplex::operator*(const MyComplex& mc){
57     MyComplex temp;
58     temp.a = a * mc.a - b*mc.b;
59     temp.b = b * mc.a + a*mc.b;
60     return temp;
61 }
62 
63 MyComplex MyComplex::operator/(const MyComplex& mc){
64     if ((mc.a == 0) && (mc.b == 0)) {
65         throw runtime_error("Divisor is 0");
66     }
67     MyComplex temp;
68     temp.a = (a*mc.a + b*mc.b) / (mc.a*mc.a + mc.b*mc.b);
69     temp.b = (b*mc.a - a*mc.b) / (mc.a*mc.a + mc.b*mc.b);
70     return temp;
71 }
72 
73 int main() { // 不可修改main函数中的代码，否则OJ将给你的程序打0分
74     MyComplex z1, z2;
75     cin >> z1;
76     cin >> z2;
77     try {
78         cout << "z1 + z2 = " << z1 + z2 << endl;
79         cout << "z1 - z2 + z1 = " << z1 - z2 + z1 << endl;
80         cout << "z1 * z2 - z1 = " << z1 * z2 - z1 << endl;
81         cout << "z1 / z2 + z1 = " << z1 / z2 + z1 << endl;
82         cout << "z2 - z1 / z1 = " << z2 - z1 / z1 << endl;
83         cout << "Finished";
84     }
85     catch (exception& e) {         // catch父类异常类型，也可以捕获子类异常
86         cout << e.what() << endl;  // waht()函数将存放在异常对象中的信息取出来
87         cout << "Unexpected Error";
88     }
89     // GCC及VC编译器在调试模式下会暂停，便于查看运行结果
90 #if ( defined(__DEBUG__) || defined(_DEBUG) )
91     cin.ignore(numeric_limits<streamsize>::max(), '\n');
92     cin.get();
93 #endif
94     return 0;
95 }