小型复数计算器项目设计，供大家参考，具体内容如下
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。
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;
}