如何用C++实现小型复数计算器

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一、问题描述及功能要求

1、实现复数的设置和显示。
2、声明一个复数类Complex，重载运算符 “+”、 “-”、 “*”、 “/”，使之能用于复数的加、减、乘、除，运算符重载函数作为Complex类的成员函数。
3、声明一个复数类Complex，重载运算符 “+”,使之能用于复数的加法运算。参加运算的两个运算量可以都是类对象，也可以其中有一个是整数，顺序任意。例如：c1+c2，i+c1, c1+i，均合法（设i为整数，c1，c2为复数），分别求两个复数之和、整数和复数之和，并显示运算结果。
4、实现用运算符 = = 进行复数的相等比较，并显示比较结果。
5、在程序中还应该有构造函数，析构函数，并要用到友元函数。

二、代码实现 带有注释

废话不说，直接代码，欢迎指正。

#include <iostream> #include <process.h> using namespace std;//标准命名空间 void home_page()//打印首页 {     cout<<"\t\t\t--------------欢迎来到复数四则计算器----------------"<<endl;     cout<<"\t\t\t|                                                  |"<<endl;     cout<<"\t\t\t|                  服务类型：（1~4）：             |"<<endl;     cout<<"\t\t\t|                1.实数与实数运算；                |"<<endl;     cout<<"\t\t\t|                2.实数与虚数运算；                |"<<endl;     cout<<"\t\t\t|                3.虚数与虚数运算；                |"<<endl;     cout<<"\t\t\t|                4.退出程序。                      |"<<endl;     cout<<"\t\t\t|                                                  |"<<endl;     cout<<"\t\t\t----------------------------------------------------"<<endl; } void second_page()//打印次页 {     cout<<"\t\t\t----------------------------------------------------"<<endl;     cout<<"\t\t\t|                                                  |"<<endl;     cout<<"\t\t\t|选择你要进行的运算类型（1~6）：                 |"<<endl;     cout<<"\t\t\t|                1.进行加法运算；                  |"<<endl;     cout<<"\t\t\t|                2.进行减法运算；                  |"<<endl;     cout<<"\t\t\t|                3.进行乘法运算；                  |"<<endl;     cout<<"\t\t\t|                4.进行除法运算；                  |"<<endl;     cout<<"\t\t\t|                5.进行比较运算；                  |"<<endl;     cout<<"\t\t\t|                6.返回上层目录；                  |"<<endl;     cout<<"\t\t\t|                                                  |"<<endl;     cout<<"\t\t\t----------------------------------------------------"<<endl; } void third_page()//程序退出提示语句 {     cout<<"程序已安全退出，感谢您的光顾，为达您的满意，我们力求下次做得更好!"<<endl; } class Complex { private:     double real;//定义虚数的实部     double imag;//定义虚数的虚部 public:     Complex(double r=0,double i=0):real(r),imag(i) {} //构造函数初始化虚数的实部和虚部     friend Complex operator +(Complex &c1,Complex &c2)//实现两虚数(或实数)相加     {         return Complex(c1.real+c2.real,c1.imag+c2.imag);     }     friend Complex operator -(Complex &c1,Complex &c2)//实现两虚数(或实数)相减     {         return Complex(c1.real-c2.real,c1.imag-c2.imag);     }     friend Complex operator *(Complex &c1,Complex &c2)//实现两虚数(或实数)相乘     {         return Complex(c1.real*c2.real-(c1.imag*c2.imag),                        c1.real*c2.imag+c2.real*c1.imag);     }     friend Complex operator /(Complex &c1,Complex &c2)//实现两虚数(或实数)相除     {         return Complex(((c1.real*c2.real)-(c1.imag*c2.imag))/                        ((c2.real*c2.real)+(c2.imag*c2.imag)),                        ((c1.real*c2.imag)+(c2.real*c1.imag))/                        ((c2.real*c2.real)+(c2.imag*c2.imag)));     }     friend bool operator ==(Complex &c1,Complex &c2)//实现两虚数(或实数)相比较     {         if(c1.real==c2.real&&c1.imag==c2.imag)         {             return true;         }         else             return false;     }     void set_real()//实现给实部赋值     {         cin>>real;     }     void set_imag()//实现给虚部赋值     {         cin>>imag;     }     void display()//显示运算结果     {         if(imag==0)         {             cout<<"结果为："<<real<<endl;         }         else             cout<<"结果为："<<real<<"+"<<imag<<"i"<<endl;     }     ~Complex(){}//析构函数 } ; int main()//主函数 {     int choice,choice1;//定义选择标志     while(1)     {         home_page();         cout<<"请选择所需的服务:"<<endl;         cin>>choice;         switch(choice)         {         case 1:             second_page();             cout<<"请选择你要进行的运算："<<endl;             cin>>choice1;             switch(choice1)             {             case 1:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个实数"<<endl;                 c1.set_real();                 cout<<"请输入第二个实数"<<endl;                 c2.set_real();                 c3=c1+c2;//+号为已重载运算符，下同                 c3.display();                 return main();//返回主函数，类似于递归，下同             }             break;             case 2:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个实数"<<endl;                 c1.set_real();                 cout<<"请输入第二个实数"<<endl;                 c2.set_real();                 c3=c1-c2;                 c3.display();                 return main();             }             break;             case 3:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个实数"<<endl;                 c1.set_real();                 cout<<"请输入第二个实数"<<endl;                 c2.set_real();                 c3=c1*c2;                 c3.display();                 return main();             }             break;             case 4:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个实数"<<endl;                 c1.set_real();                 cout<<"请输入第二个实数"<<endl;                 c2.set_real();                 c3=c1/c2;                 c3.display();                 return main();             }             break;             case 5:             {                 Complex c1(0.0,0.0),c2(0.0,0.0);                 cout<<"请输入第一个实数"<<endl;                 c1.set_real();                 cout<<"请输入第二个实数"<<endl;                 c2.set_real();                 if(c1==c2)                     cout<<"两数相等"<<endl;                 else                     cout<<"两数不相等"<<endl;                     return main();             }             case 6:             {                 return main();             }             }             break;         case 2:             second_page();             cout<<"请选择你要进行的运算："<<endl;             cin>>choice1;             switch(choice1)             {             case 1:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个实数"<<endl;                 c1.set_real();                 cout<<"请输入第二个虚数的实部"<<endl;                 c2.set_real();                 cout<<"请输入第二个虚数的虚部"<<endl;                 c2.set_imag();                 c3=c1+c2;                 c3.display();                 return main();             }             break;             case 2:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个实数"<<endl;                 c1.set_real();                 cout<<"请输入第二个虚数的实部"<<endl;                 c2.set_real();                 cout<<"请输入第二个虚数的虚部"<<endl;                 c2.set_imag();                 c3=c1-c2;                 c3.display();                 return main();             }             break;             case 3:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个实数"<<endl;                 c1.set_real();                 cout<<"请输入第二个虚数的实部"<<endl;                 c2.set_real();                 cout<<"请输入第二个虚数的虚部"<<endl;                 c2.set_imag();                 c3=c1*c2;                 c3.display();                 return main();             }             break;             case 4:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个实数"<<endl;                 c1.set_real();                 cout<<"请输入第二个虚数的实部"<<endl;                 c2.set_real();                 cout<<"请输入第二个虚数的虚部"<<endl;                 c2.set_imag();                 c3=c1/c2;                 c3.display();                 return main();             }             break;             case 5:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个实数"<<endl;                 c1.set_real();                 cout<<"请输入第二个虚数的实部"<<endl;                 c2.set_real();                 cout<<"请输入第二个虚数的虚部"<<endl;                 c2.set_imag();                 if(c1==c2)                     cout<<"两数相等"<<endl;                 else                     cout<<"两数不相等"<<endl;                     return main();             }             break;             case 6:             {                 return main();             }             }         case 3:             second_page();             cout<<"请选择你要进行的运算："<<endl;             cin>>choice1;             switch(choice1)             {             case 1:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个虚数的实部"<<endl;                 c1.set_real();                 cout<<"请输入第一个虚数的虚部"<<endl;                 c1.set_imag();                 cout<<"请输入第二个虚数的实部"<<endl;                 c2.set_real();                 cout<<"请输入第二个虚数的虚部"<<endl;                 c2.set_imag();                 c3=c1+c2;                 c3.display();                 return main();             }             case 2:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个虚数的实部"<<endl;                 c1.set_real();                 cout<<"请输入第一个虚数的虚部"<<endl;                 c1.set_imag();                 cout<<"请输入第二个虚数的实部"<<endl;                 c2.set_real();                 cout<<"请输入第二个虚数的虚部"<<endl;                 c2.set_imag();                 c3=c1-c2;                 c3.display();                 return main();             }             break;             case 3:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个虚数的实部"<<endl;                 c1.set_real();                 cout<<"请输入第一个虚数的虚部"<<endl;                 c1.set_imag();                 cout<<"请输入第二个虚数的实部"<<endl;                 c2.set_real();                 cout<<"请输入第二个虚数的虚部"<<endl;                 c2.set_imag();                 c3=c1*c2;                 c3.display();                 return main();             }             break;             case 4:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个虚数的实部"<<endl;                 c1.set_real();                 cout<<"请输入第一个虚数的虚部"<<endl;                 c1.set_imag();                 cout<<"请输入第二个虚数的实部"<<endl;                 c2.set_real();                 cout<<"请输入第二个虚数的虚部"<<endl;                 c2.set_imag();                 c3=c1/c2;                 c3.display();                 return main();             }             break;             case 5:             {                 Complex c1(0.0,0.0),c2(0.0,0.0),c3(0.0,0.0);                 cout<<"请输入第一个虚数的实部"<<endl;                 c1.set_real();                 cout<<"请输入第一个虚数的虚部"<<endl;                 c1.set_imag();                 cout<<"请输入第二个虚数的实部"<<endl;                 c2.set_real();                 cout<<"请输入第二个虚数的虚部"<<endl;                 c2.set_imag();                 if(c1==c2)                     cout<<"两数相等"<<endl;                 else                     cout<<"两数不相等"<<endl;                     return main();             }             case 6://返回上层目录             {                 return main();             }             }             break;         case 4://退出程序             third_page();             break;         }         break;     }     return 0; }

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