[C++程序设计] 简易计算器

矫情吗；* 2023-09-29 10:39 49阅读 0赞

设计一个简易计算器，使其能够完成最基本的整数或实数的加、减、乘、除运算，程序运行结果如图：

![watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5bCP6bqm6bqm6bqm5ZWK_size_17_color_FFFFFF_t_70_g_se_x_16][]

源代码如下：

头文件：

#ifndef Header_h
    #define Header_h
    
    //目录
    int catalog();
    
    //加法
    int plus1(int a,int b);            //整数加法
    double plus1(double a,double b);     //实数加法
    
    //减法
    int minus1(int a,int b);
    double minus1(double a,double b);
    
    //乘法
    int times1(int a,int b);
    double times1(double a,double b);
    
    //除法
    int divide1(int a,int b);
    double divide1(double a,double b);
    
    #endif /* Header_h */

加法函数模块：

#include <iostream>
    using namespace std;
    
    int plus1(int a,int b)
    {
        return a+b;
    }
    
    double plus1(double a,double b)
    {
        return a+b;
    }

减法函数模块：

#include <iostream>
    using namespace std;
    int minus1(int a,int b)
    {
        return a-b;
    }
    
    double minus1(double a,double b)
    {
        return a-b;
    }

乘法函数模块：

#include <iostream>
    using namespace std;
    int times1(int a,int b)
    {
        return a*b;
    }
    
    double times1(double a,double b)
    {
        return a*b;
    }

除法函数模块：

#include <iostream>
    using namespace std;
    int divide1(int a,int b)
    {
        return a/b;
    }
    
    double divide1(double a,double b)
    {
        return a/b;
    }

目录函数模块：

#include <iostream>
    #include "Header.h"
    using namespace std;
    int catalog()
    {
        //第一页目录显示
        cout<<"***************计算器****************\n"<<endl;
        
        cout<<"加法————————————————————————1\n"<<endl;
        
        cout<<"减法————————————————————————2\n"<<endl;
        
        cout<<"乘法————————————————————————3\n"<<endl;
        
        cout<<"除法————————————————————————4\n"<<endl;
        
        cout<<"退出————————————————————————0\n"<<endl;
        
        //输入 选择目录
        cout << "请输入选择：";
        int x;
        int a,b;
        double c,d;
        cin>>x;
        
        //选择后的第二页目录
        if(x==0)
        {
            cout<<"已退出！\n";
            return 0;
        }
        
        //进入加法选择
        else if(x==1)
        {
            
            cout<<"整数加法————————————————————————10\n"<<endl;
            
            cout<<"实数加法————————————————————————11\n"<<endl;
            
            cout<<"请输入选择：";
            cin>>x;
            cout<<endl;
            
            if(x==10)
            {
                cout<<"请输入两个整数：";
                cin>>a>>b;
                cout<<a<<" + "<<b<<" = "<<plus1(a,b)<<endl;
            }
            else if(x==11)
            {            cout<<"请输入两个实数：";
                cin>>c>>d;
                cout<<c<<" + "<<d<<" = "<<plus1(c,d)<<endl;
            }
            else
                cout<<"输入错误！\n";
            
        }
        
        //进入减法选择
        else if (x==2)
        {
            cout<<"整数减法————————————————————————20\n"<<endl;
            
            cout<<"实数减法————————————————————————21\n"<<endl;
            
            cout<<"请输入选择：";
            cin>>x;
            cout<<endl;
            
            if(x==20)
            {
                cout<<"请输入两个整数：";
                cin>>a>>b;
                cout<<a<<" - "<<b<<" = "<<minus1(a,b)<<endl;
            }
            else if(x==21)
            {            cout<<"请输入两个实数：";
                cin>>c>>d;
                cout<<c<<" - "<<d<<" = "<<minus1(c,d)<<endl;
            }
            else
                cout<<"输入错误！\n";
        }
        
        //进入乘法选择
        else if (x==3)
        {
            cout<<"整数乘法————————————————————————30\n"<<endl;
            
            cout<<"实数乘法————————————————————————31\n"<<endl;
            
            cout<<"请输入选择：";
            cin>>x;
            cout<<endl;
            
            if(x==30)
            {
                cout<<"请输入两个整数：";
                cin>>a>>b;
                cout<<a<<" * "<<b<<" = "<<times1(a,b)<<endl;
            }
            else if(x==31)
            {            cout<<"请输入两个实数：";
                cin>>c>>d;
                cout<<c<<" * "<<d<<" = "<<times1(c,d)<<endl;
            }
            else
                cout<<"输入错误！\n";
        }
        
        //进入除法选择
        else if(x==4)
        {
            cout<<"整数除法————————————————————————40\n"<<endl;
            
            cout<<"实数除法————————————————————————41\n"<<endl;
            
            cout<<"请输入选择：";
            cin>>x;
            cout<<endl;
            
            if(x==40)
            {
                cout<<"请输入两个整数：";
                cin>>a>>b;
                if(b==0)
                {
                    cout<<"分母不能为0\n";
                    return 0;
                }
                cout<<a<<" / "<<b<<" = "<<divide1(a,b)<<endl;
            }
            else if(x==41)
            {
                cout<<"请输入两个实数：";
                cin>>c>>d;
               if (d==0)
               {
                   cout<<"分母不能为0\n";
                   return 0;
               }
                cout<<c<<" / "<<d<<" = "<<divide1(c,d)<<endl;
            }
            else
                cout<<"输入错误！\n";
        }
        
        //输入错误
        else
        {
            cout<<"输入错误！";
            return 0;
        }
        
        
        return 0;
    }

主函数：

#include <iostream>
    #include "Header.h"
    using namespace std;
    int main() {
        
        catalog();
        return 0;
    }

程序实现了基本的整数或实数的加、减、乘、除的简单运算。

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