Thread: Password Program

  1. #1
    Registered User
    Join Date
    Mar 2009

    Password Program


    I am required to write a program in which a user will enter a password, and this password will be reversed and compared with the reverse of the actual password. In this case, the correct password is 'fred', but the program will compare 'derf' with 'derf', and the tell the user the password is correct.

    Here is my current code:

    /* Password Program */
    /* By Luke Sowersby */
    #include <stdio.h>
    #include <conio.h>
    #include <string.h>
    #define pass1 "derf"
    #define string_size 25
    #define string_end (string_size-1)
    void string_swap(char[],char[]);
    void main(void)
        char pass2[string_size], backwards[string_size];
        printf("Please enter password:\n");
        string_swap(pass2, backwards);
        printf("Backwards: %s",backwards);
        if (backwards=="derf")
            printf("\nPass is correct");
            printf("\nPass is incorrect");
    void string_swap(char string[], char swap[])
    int i;
    At the moment, the program will reverse the word, but does not successfully carry out the 'if' condition execution.

    Can anyone help me please?


  2. #2
    Hurry Slowly vart's Avatar
    Join Date
    Oct 2006
    Rishon LeZion, Israel
    to compare strings use strcmp (read function description to know what the return value means)
    All problems in computer science can be solved by another level of indirection,
    except for the problem of too many layers of indirection.
    David J. Wheeler

  3. #3
    Registered User
    Join Date
    Mar 2009
    Thanks... I managed to get it working.

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