String compare problems

Hey guys

I am making a very simple string program to test logical operators and although this compiles its not giving the correct output.

Code:

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#include <stdio.h>
#include <string.h>

int main ( void ) {
        char username[ 15 ];
        char password[ 20 ];
        int flag = 0;

        puts("Enter your username: ");
        fgets( username, 15, stdin );
        puts("Enter your password: ");
        fgets( password, 20, stdin );

        if (( strcmp( username, "peter") == 0 ) && ( strcmp( password, "willow") == 0)) {
                puts("\nWelcome to the network!");
                flag = 10;
        }

        if (( strcmp( username,  "guest") == 0 ) || ( strcmp( password, "guest")) == 0 ) {
                puts("\nGuest registration valid for 24hrs");
                flag = 2;
        }

        if (!flag ) {
                puts("\nInvalid input!");
}

        return 0;
}

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I keep getting "Invalid input returned when ever i compare the strings, can
anyone see what I am doing wrong?

Thank in advance guys.

You're not stripping the newlines from fgets() . . .

I forgot to add

Code:

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username[ strlen(username ) -1 ]= 0;

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Cheers Nightowl

Same thing for password, of course . . . :)

Quote:

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Originally Posted by swgh

I forgot to add

Code:

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username[ strlen(username ) -1 ]= 0;

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Cheers Nightowl

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That will fail if the strlen() returns 0 - which would happen if someone enters CTRL-Z or CTRL-D depending on platform.

--
Mats

Use a "chomp" style function:

Code:

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void chomp (char *line) {
        int len=strlen(line);
        if ((len>0) && (line[len-1]=='\n'))
                        line[len-1]='\0';
}

chomp(username);
chomp(password);

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