Thread: simple login program problem

My sample code:

Code:

#include <stdio.h>
#include <string.h>
#define name1 "denny"
#define pass1 "123"

int main(int argc, char *argv[])
{   char name[5];
    char pass[3];

    if(argc != 2)
    {        printf("Usage: login Your_Username Your_Password\n");
             exit(1);
    }
    scanf(argv[1],"%s", &name); // to read username argument
    scanf(argv[2],"%s", &pass; // to read password argument

    if(strcmp(name,name1) == 0 && strcmp(pass,pass1) == 0)
       printf("Correct username and password");

    else
       printf("Wrong username and password");
    return 0;
}

Hi I'm a new user of c programming.
My purpose of doing this programming is letting the user to key in their username and password.

The program must be run from console.

It looks like

D:\c>login
Usage:login Your_Username Your_Password

But the problem is, i do not know how to read the username and the password key in by the user. anyone can fix my program?
I'll be very thankful if someone can help me.

Code:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define name1 "denny"
#define pass1 "123"

int main(int argc, char *argv[])
{  
    char * name;
    char * pass;

    if(argc != 3)
    {        
        printf("Usage: login Your_Username Your_Password\n");
         exit(1);
    }

    name = argv[1];
    pass = argv[2];    

    if(strcmp(name,name1) == 0 && strcmp(pass,pass1) == 0)
       printf("Correct username and password\n");
    else
       printf("Wrong username and password\n");

    return 0;
}

thanx a lot for the help.

You might want to consider hiding the password when the user types it in. A search of these forums would yield several possible solutions, depending on your environment O/S etc.

Originally Posted by SKeane

You might want to consider hiding the password when the user types it in. A search of these forums would yield several possible solutions, depending on your environment O/S etc.

nah, i'm quite satisfied with it now. Coz i'm tryin to do bufferoverrun.
I might have a question again later regarding buffer overrun.
anyway thanx for you help SKeane

[QUOTE=maven]

Originally Posted by suckss

My sample code:

Code:

    scanf(argv[1],"%s", &name); // to read username argument
    scanf(argv[2],"%s", &pass; // to read password argument

    }

QUOTE]
After getting the exact answer what u want, Did U try to know what does argc and argv means?

yeah what does argc and agrv means...coz im new to C. i prefer c++ rather than C. i never study c before and it's quite confusing for me to see the codes.

Can i store the username entered by the user and the password to an array instead of storing it into a pointer? what's the code will looks like?