Password Checker

//  Password Checker
//  Date: 09.12.19
#include<stdio.h>
#include<conio.h>
#include<string.h>

int main(){
    //  Change these two as you like
    //  You will have to enter them as input
    //  when running the program.
    char userName[] = "user";
    char password[] = "password";

    int userNameLength = (sizeof(userName) / sizeof(char));
    int passwordLength = (sizeof(password) / sizeof(char));

    char inputUserName[userNameLength];
    char inputPassword[passwordLength];

    printf("Enter User Name: ");
    scanf("%s", inputUserName);
    printf("Enter password: ");
    int i;

    //  When typing the password you will see '*'
    //  Because of below for loop.
    //  getch() function takes only one char as input
    for(i = 0; i < passwordLength-1; i++){
        inputPassword[i] = getch();
        printf("*");
    }
    //  '\0' has to be added at the last of the char array
    //  inorder to make the char array a string.
    inputPassword[i] = '\0';

    //  Checking if the user inputs and the user name and the password is same or not.
    if(!strcmp(userName, inputUserName) && !strcmp(password, inputPassword)){
        printf("\n\nPassword Correct! \n\n");
        printf("Welcome! %s \n\n", userName);
    }
    else{
        printf("\n\nInvalid user name or password.\n");
    }
}
//  Do a little bit of research on it.
//  Still not clear then ask.
//  Try not to memorize but to understand.