Username & Password

#include <stdio.h>
#include <termios.h> // in gcc, use < conio.h > in turboc
#include <string.h>
 
#define USERNAME    "user001"
#define PASSWORD    "ok@123"
 
/************************************************
THIS CODE IS USED IN GCC LINUX
because getch() is not defined in library file
************************************************/
 
static struct termios old, new;
 
/* Initialize new terminal i/o settings */
void initTermios(int echo)
{
  tcgetattr(0, &old); /* grab old terminal i/o settings */
  new = old; /* make new settings same as old settings */
  new.c_lflag &= ~ICANON; /* disable buffered i/o */
  new.c_lflag &= echo ? ECHO : ~ECHO; /* set echo mode */
  tcsetattr(0, TCSANOW, &new); /* use these new terminal i/o settings now */
}
 
/* Restore old terminal i/o settings */
void resetTermios(void)
{
  tcsetattr(0, TCSANOW, &old);
}
 
/* Read 1 character - echo defines echo mode */
char getch_(int echo)
{
  char ch;
  initTermios(echo);
  ch = getchar();
  resetTermios();
  return ch;
}
 
/* Read 1 character without echo */
char getch(void)
{
  return getch_(0);
}
 
/* Read 1 character with echo */
char getche(void)
{
  return getch_(1);
}
 
/* function :   getPassword(),
   to get password from keyboard    */
 
void getPassword(char *pass)
{
    int c=0;
    char buff[30]={0},ch;
    int len=0;
    while((ch=getch())!='\n')
    {
        if(ch==0x7f)    // use 0x08 in turboc (WINDOWS)
        {
            if(len==0)  continue;
            printf("\b \b"); len--; continue;
        }
        printf("%c",'*');
        pass[len]=ch;
        len++;
    }
    pass[len]='\0';
 
}
 
int main()
{
 
    char user[30],pass[30];
    printf("Enter User Name :");
    gets(user);
    printf("Enter Password  :");
    getPassword(pass);
     
    if(strcmp(user,USERNAME)==0 && strcmp(pass,PASSWORD)==0)
        printf("\nLOGIN SUCCESS.\n");
    else
        printf("\nLOGIN FAILED.\n");
    return 0;
}