Simple Class definition

This is a discussion on Simple Class definition within the C++ Programming forums, part of the General Programming Boards category; I decided to relearn some of the stuff i should already know. I am trying to make a class, and ...

  1. #1
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    Simple Class definition

    I decided to relearn some of the stuff i should already know.
    I am trying to make a class, and a member function that displays a simple character.

    here is the code that i have split into 3 files
    the error i get is something like "Multiple definitions of info::display"

    can anyone see what the error is?

    Code:
    class info
    {
     public:
                 
        void display();
         
      //   int length();
         
      //   char concatenate();
         
      //   char substring();
         
         
         private:
         char s;
         
         };

    Code:
    #include "4dot6header.h"
    
    
    void info::display()
    {
    
        
    }

    Code:
    #include<iostream>
    #include "4dot6.cpp"
    using namespace std;
    
    int main()
    {
        info a;
        a.display();
        
    
    
    system("pause");
    return 0;
    }

  2. #2
    C++ Witch laserlight's Avatar
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    Instead of including "4dot6.cpp", include "4dot6header.h". "4dot6header.h" should also have header inclusion guards.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
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    Im not understanding what u mean. can u right that in the code?

  4. #4
    C++ Witch laserlight's Avatar
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    Code:
    #ifndef INCLUDED_4DOT6HEADER_H_
    #define INCLUDED_4DOT6HEADER_H_
    
    class info
    {
        public:
    
        void display();
    
        //   int length();
    
        //   char concatenate();
    
        //   char substring();
    
    private:
        char s;
    
    };
    
    #endif
    Code:
    #include <iostream>
    #include "4dot6header.h"
    using namespace std;
    
    int main()
    {
        info a;
        a.display();
    
        system("pause");
        return 0;
    }
    Incidentally, system() is found in <cstdlib>, not <iostream>.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

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