First password program

This is a discussion on First password program within the C++ Programming forums, part of the General Programming Boards category; Hey, i made this password program but i am having trouble getting it to work. the last thing i need ...

  1. #1
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    First password program

    Hey, i made this password program but i am having trouble getting it to work. the last thing i need to do it be able to compare the inputed password to the actual password (in this program i want it to be "matt") im not sure how i do this, could someone help? with this code i get undefined symbol 'matt' when i try to compile with borland. i know why i just dont know how to fix it :S

    Code:
    //Passwod Program
    //By Matt
    
    #include <iostream>
    
    using namespace std;
    
    int main() {
    
    char password[5];
    
    
    start:
    
    cout<<"* * * * * * * * * * * * * \n";
    cout<<"  Please enter your PIN   \n";
    cout<<"-------   4 letters  ------ \n";
    cout<<"* * * * * * * * * * * * * \n";
    
    cin.getline (password, 5, '\n' );
    
    if(password == matt ) {
    cout<<"Thank You! \n";
    
    }
    else {
    
    cout<<"Sorry Incorrect PIN \n";
    goto start;
    }
    
    }
    Last edited by MaaaTtY; 02-14-2009 at 10:32 AM.

  2. #2
    C++まいる!Cをこわせ!
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    Code:
    // Password Program
    // By Elysia
    
    #include <iostream>
    #include <string>
    
    using namespace std;
    
    int main()
    {
        std::string password;
        const std::string correct_password = "matt";
        do
        {
            cout << "* * * * * * * * * * * * * \n";
            cout << "  Please enter your PIN   \n";
            cout << "-------   4 letters  ------ \n";
            cout << "* * * * * * * * * * * * * \n";
            getline(cin, password);
    
            if (password != correct_password)
                cout << "Sorry Incorrect PIN \n";
        }
        while (password != correct_password);
    
        cout << "Thank You!\n";
    }
    I figured it was easier to show REAL code instead of explaining all the wrong's with your code. Now it's your task to find out why I wrote it the way I did and what's wrong with your approach.
    Last edited by Elysia; 02-14-2009 at 12:28 PM. Reason: Compile errors - begone!
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

  3. #3
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    haha thats funny, thanks alot though, it will definetly help alot :]

  4. #4
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    i tried to compile yours and i got this error:

    could not find a match for 'getline<charT,traits,Allocator><string,istream>' in function main()

  5. #5
    For Narnia! Sentral's Avatar
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    Make sure you:
    Code:
    #include <string>
    The other problem is getline, it should be:
    Code:
    getline(cin,password);
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  6. #6
    C++まいる!Cをこわせ!
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    Good corrections... didn't test to compile the code. It's easy to miss a few things here and there.
    I updated the original post to fix those errors... it's good to have a compilable example!
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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