Guessing Game

In this game, the computer chooses a word at random from a given list of words. This word is the answer. The player then tries to guess the word, by guessing one letter at a time. Whenever the user guesses a letter that is in the answer, all occurrences of that letter are revealed to the user. The game ends when the user has guessed every letter in the word, before he reaches the allowed number of strikes.This program is amazing. The focus is to use and manipulate strings and loops.We have tried to make this project easy.
Below is given the  source code of the game. Enjoy.

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

const int MAXLENGTH=80;
const int MAX_TRIES=5;
const int MAXROW=7;

int letterFill (char, char[], char[]);
void initUnknown (char[], char[]);

int main ()
{
char unknown [MAXLENGTH];
char letter;
int num_of_wrong_guesses=0;
char word[MAXLENGTH];
char words[][MAXLENGTH] =
{
"india",
"pakistan",
"nepal",
"malaysia",
"philippines",
"australia",
"iran",
"ethiopia",
"oman",
"indonesia"
};

//choose and copy a word from array of words randomly
randomize();
int n=random(10);
strcpy(word,words[n]);

// Initialize the secret word with the * character.
initUnknown(word, unknown);

// welcome the user
cout << "\n\nWelcome to the game...Guess a country Name";
cout << "\n\nEach letter is represented by a star.";
cout << "\n\nYou have to type only one letter in one try";
cout << "\n\nYou have " << MAX_TRIES << " tries to try and guess the word.";
cout << "\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~";

// Loop until the guesses are used up
while (num_of_wrong_guesses < MAX_TRIES)
{
cout << "\n\n" << unknown;
cout << "\n\nGuess a letter: ";
cin >> letter;
// Fill secret word with letter if the guess is correct,
// otherwise increment the number of wrong guesses.
if (letterFill(letter, word, unknown)==0)
{
cout << endl << "Whoops! That letter isn't in there!" << endl;
num_of_wrong_guesses++;
}
else
{
cout << endl << "You found a letter! Isn't that exciting!" << endl;
}
// Tell user how many guesses has left.
cout << "You have " << MAX_TRIES - num_of_wrong_guesses;
cout << " guesses left." << endl;
// Check if they guessed the word.
if (strcmp(word, unknown) == 0)
{
cout << word << endl;
cout << "Yeah! You got it!";
break;
}

}
if(num_of_wrong_guesses == MAX_TRIES)
{
cout << "\nSorry, you lose...you've been hanged." << endl;
cout << "The word was : " << word << endl;
}
getch();
return 0;
}

/* Take a one character guess and the secret word, and fill in the
 unfinished guessword. Returns number of characters matched.
 Also, returns zero if the character is already guessed. */

int letterFill (char guess, char secretword[], char guessword[])
{
int i;
int matches=0;
for (i = 0; secretword[i]!='\0'; i++)
{

// Did we already match this letter in a previous guess?
if (guess == guessword[i])
return 0;

// Is the guess in the secret word?
if (guess == secretword[i])
{
guessword[i] = guess;
matches++;
}
}
return matches;
}


// Initialize the unknown word

void initUnknown (char word[], char unknown[])
{
int i;
int length = strlen(word);
for (i = 0; i < length; i++)
unknown[i]='*';
unknown[i]='\0';
}

I'm sure that it will give the output without any error ^_^...!!!