hangman

#include<iostream>
#include<cstring>
using namespace std;

const int MAX_WORD_LEN = 100;
const int TOTAL_LIVES = 10;

int find_len( const char word[] );

void clear_screen();

void create_hidden( const char word[] ,char hidden[] , int len );

int main(){
  cout << "Welcome to Hangman\n" <<
			"Please enter your word and then press enter: ";
	char word[MAX_WORD_LEN + 1] = {'\0'};
	cin.getline( word , 100 );
	int len  = find_len(word);
	
	int lives = TOTAL_LIVES;
	cout << len << endl;
	
	char hidden[MAX_WORD_LEN + 1];
	create_hidden( word , hidden , len );
	cout << hidden;

	char used[ MAX_WORD_LEN ] = {'\0'};

	while( lives > 0 and strncmp( word , hidden , len ) != 0 ){
		clear_screen();
		cout << hidden << endl <<
				"You have guessed the following: " <<
				used << endl <<
				"Please enter your guess: ";
		char guess;
		cin >> guess;
		bool changed = false;
		for(int i = 0 ; i < len ; i++ ){
			if( guess == word[i]){
				hidden[i] = guess;
				changed = true;
			}
		}
		if( changed == false ){
			used[TOTAL_LIVES - lives] = guess;
			lives--;
		}
	}
	if( lives == 0 ){
		cout << endl << endl << "Sorry, you lost, the word was: " <<
				word << endl;
	}
	else
		cout << endl << endl << "Congratulations on guessing: " <<
				word << endl;
}

int find_len( const char word[] ){
	int i = 0;
	while( word[i] != '\0' )
		i++;
	return i;
}

void clear_screen(){
	for( int i = 0 ; i < 100 ; i++ ){
		cout << endl;
	}
}

void create_hidden( const char word[] , char hidden[] , int len ){
	for(int i = 0 ; i < len ; i++ ){
		if( isspace( word[i]))
			hidden[i] = ' ';
		else
			hidden[i] = '-';
	}
	hidden[len] = '\0';
}