PassProtector.c

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

// Define Constant KeyWords 
#define ENTER 13
#define TAB 9
#define BKSP 8

//Function protoType
void password(void);

void main(){
    password();
    getch();
}

void password(){

    char pwd[255];
    char code[255] = {"Alkaison"};
    int i = 0;
	char ch;

    system("cls");
	printf("Enter your password. Hit ENTER to confirm. \n");
	printf("Password:");

	while(1)
    {

		ch = getch(); // get key
        fflush(stdin);  // clears the input buffer in console 

		if(ch == ENTER || ch == TAB)
        {
			pwd[i] = '\0';
			break;
		}
        else if(ch == BKSP)
        {
			if(i > 0)
            {
				i--;
				printf("\b \b"); // for backspace
			}
		}
        else
        {
			pwd[i++] = ch;
			printf("* \b");	// to replace password character with * 
		}
	}


    // verifies the password 
    if(strcmp(code, pwd) == 0)
        printf("\nCorrect Password! \n");
    else
        printf("\nInvaild Password! \n");
}