Thread: Classes Continued.

Originally Posted by Aliaks

I understand the basics

I think otherwise. Create the user class, declare and define some functions in their related files. Define your main() function, and use the functions where they need to be used.

Tell us what you have a problem with. "Don't fully understand how the top part works" isn't quite up to scratch. Help us to help you.

Originally Posted by Aliaks

Well I had something like this before..

Code:

class User {

public:
        
        void setName(string Name);                                 // Accessors
        void setAge(int age);

       private:

        string Name; 
        int age;
        
}

I used my dog class as a example which was this

Code:

class Dog                                                          // Begins declaration of class
{                                                                  //
    public:                                                        // Begins public section
        Dog();
        ~Dog();                                                    //
        void Woof() {cout << "Woof! \n\n";}                        // General functions and so fourth
        void Info()    {;}
    private:
};

Would these be correct?

Correct? The only way a class can be correct is if it does what it's suppose to do, and only you, the creator, can decide that. We can tell you various things that aren't allowing the class to be correct however, such as:

Code:

class Dog                                                          // Begins declaration of class
{                                                                  //
    public:                                                        // Begins public section
        Dog();
        ~Dog();                                                    //
        void Woof() {cout << "Woof! \n\n";}                        // General functions and so fourth
        void Info()    {;} /*I'm not sure that this is legal, I may be wrong however*/
    private:
};

Well the way I'm thinking of is to take input in main(), and store it into your variables using your setter functions. Then output it when needed using your getter functions.

e.g.

User.h

Code:

#include <iostream>
#ifndef USER_H /*Inclusion guards*/
#define USER_H

class User
{
public:
    void vSetUserName(std::string); /*Function for setting the username, takes a string*/
    void vSetAge(int); /*Function for setting the age, takes an int*/

    std::string sGetUserName() const; /*Function for retrieving the username*/
    int iGetAge() const; /*Function for retrieving the age*/

private:
    std::string m_sUsername;
    int m_iAge;
};

#endif /*USER_H*/

The next step is to define the class member functions in a source file:

User.cpp

Code:

#include "User.h"

void User::vSetUserName(std::string sUsername)
{
    m_sUsername = sUsername; /*Store the contents of sUsername in m_sUsername*/
}

void User::vSetAge(int iAge)
{
    m_iAge = iAge; /*Store the value of iAge in m_iAge*/
}

std::string User::sGetUserName() const
{
    return m_sUsername; /*Return the variable to the program*/
}

int User::iGetAge() const
{
    return m_iAge; /*Return the variable to the program*/
}

The final step is to use the functions to do as you please:

Main.cpp

Code:

#include "User.h"

int main()
{
    User NewUser; /*Create a User object*/
    std::string sTempUserName; /*Create a temporary variable for input*/
    int iTempAge; /*Create a temporary variable for input*/

    std::cout << "Enter Your Username: ";
    std::cin >> sTempUsername; /*Store the user input in the temporary variable*/
    std::cout << "\nAnd now your Age: ";
    std::cin >> iTempAge; /*Store the user input in the temporary variable*/

    NewUser.vSetUserName(sTempUserName); /*Set the username*/
    NewUser.vSetAge(iTempAge); /*Set the age*/

    std::cout << "\nYour Username is: " << NewUser.sGetUserName();
    std::cout << "\nYour Age is: " << NewUser.iGetAge();
    std::cin.get();

    return 0;
}

This should do what you just explained.

NOTE - This was all off of the top of my head, so if you find bugs, point them out.

It's temporary because we declare it in main(), therefore it gets destroyed at the end of main. It's also temporary because we pass it into vSetUserName(std::string), and that's all we do with it.

By all means, you can call it something else. This is just my programming style.

What does cin.get() do?

I can kinda of guess, but how does it know what to return?

legit: SourceForge.net: Do not remove parameter names - cpwiki
Aliaks: It waits for the user to enter one character, it's used like sort of like a pause. Look here for more info, or better solutions: SourceForge.net: Pause console - cpwiki

Thanks Elysia, interesting.