c++ - C++ 的类和 header

Question

我正在尝试学习如何在 C++ 中使用类函数。我有我在这里编写的代码，但有些地方不对。我知道你不做作业。但如果你能帮助我学习它没有使用像你在这里看的东西..我已经完成了研究..google cpluplus 网站..但是有些东西我没有得到所以希望你能帮助我。我正在使用 Dev-C++。

代码取两个数字，然后根据选择使用..add..subtract..multiply..and devide 来计算它们

这是我的第一个错误代码

30  23  C:\Users\ddempsey\Desktop\class\addSubtractMain.cpp [Error] no matching function for call to 'addSubtract::initialize()'

这是我的标题代码

#ifndef CLASS_addSubtract_h
#define CLASS_addSubtract_h

class addSubtract
{
    private:
       int one;
       int two;


    public:
        int add ();
        int sub ();
        int multi ();
        int devide ();
        void initialize (int n1, int n2);
};

类

using namespace std;

#include "addSubtract.h"



void addSubtract::initialize(int n1, int n2)
{
    one = n1;
    two = n2;
}
int addSubtract::add()
{

   return(one + two);
}
int addSubtract::sub()
{

   return(one - two);
}

int addSubtract::multi()
{

   return(one * two);
}

int addSubtract::devide()
{

   return(one / two);
}
//class function code

主要

#include "addSubtract.h"
#include <iostream>
#include <fstream>
#include <string.h>
#include <stdio.h>
using namespace std;
int main(void)
{
    addSubtract numbers; //instantiate an object
    int n1;
    int n2;
    char choice;

    cout<<"Enter first number to calculate  ";
    cin>>n1;
    cout<<"\n";
    cout<<"Enter second number to calculate  ";
    cin>>n2;
    cout<<"\n";
    cout<<"what would you like to do\n ";
    cout<<" add enter      (+)\n ";
    cout<<" subtract enter (-)\n ";
    cout<<" multiply enter (*)\n ";
    cout<<" devide enter   (/)\n ";
    cin>>choice;

        switch (choice)
        {
            case '+' :
            numbers.initialize(int1, int2); 
            cout<<n1<<" + "<<n2<<" ="<<numbers.add()<<endl;
            break;
            case '-' :
            numbers.initialize(int1, int2); 
            cout<<n1<<" - "<<n2<<" = "<<numbers.sub()<<endl;
            break;
            case '*' :
            numbers.initialize(int1, int2); 
            cout<<n1<<" * "<<n2<<" = "<<numbers.multi()<<endl;
            break;
            case '/' :
            numbers.initialize(int1, int2); 
            cout<<n1<<" / "<<n2<<" = "<<numbers.devide()<<endl;
            break;  
            default:
            cout<<"invalid choice" <<endl;          
        }


system("PAUSE");    
return 0;

}

Answer 1

numbers.initialize(int1, int2); 到 numbers.initialize(n1, n2);

除此之外你的代码没问题。