Thread: Including header

  1. #1
    Registered User
    Join Date
    Jan 2013
    Posts
    114

    Including header

    Hi,, I am trying to include a function from a header file named headerfunt.h . The code of my header file is
    Code:
    #ifndef HEADERFUNCT_H_INCLUDED
    #define HEADERFUNCT_H_INCLUDED
    #include <iostream>
    using namespace std;
    struct headerfunct{
       int abs(int arg)
    {
        if(arg<0)
        {
            return -arg;
        }
        else{return arg;}
    }
    
     };
    #endif // HEADERFUNCT_H_INCLUDED
    and the source code is
    Code:
    #include <iostream>
    using namespace std;
    #include "headerfunct.h"
    int main()
    {
    int j;
    while(cin>>j)
    {
        cout<<"Abs of "<<j<<" is "<<abs(j)<<endl;
    }
    }
    But, while compiling it says abs was not declared... I have included the file. so wheres the problem. Thanks in advance.

  2. #2
    Registered User
    Join Date
    Jun 2009
    Posts
    117
    Your implementation of abs() function is declared within headerfunct context, so you need to create an object of this structure.

  3. #3
    Registered User
    Join Date
    Jan 2013
    Posts
    114
    Thanks. It worked.
    Code:
    #ifndef HEADERFUNCT_H_INCLUDED
    #define HEADERFUNCT_H_INCLUDED
    #include <iostream>
    using namespace std;
    
       int abs(int arg)
    
    {
    
        if(arg<0)
    
        {
    
            return -arg;
    
        }
    
        else{return arg;}
    
    }
    
     
    
     #endif // HEADERFUNCT_H_INCLUDED

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