Lychrel numbers

lychrel.c

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

bool palindrome ( unsigned long long int i );
unsigned long long int reverse ( unsigned long long int i );
bool lychrel ( unsigned long long int i );

int main ( void )
{
	unsigned long long int i=0;
	int count=0;

	for(i=1;i<10000;i++)
	{
		if(lychrel(i))
		{
			count++;
		}
	}

	printf("\n\%d\n", count);

	return 0;
}

bool lychrel ( unsigned long long int i )
{
	int j; /*iteration counter*/
	bool lychrel = true;
	i = i + reverse ( i );

	for ( j = 1; j <= 30 ; j++ )
	{
		if ( palindrome ( i ) )
		{
			lychrel = false;
			break;
		}
		i = i + reverse ( i );
	}

	return lychrel;
}

unsigned long long int reverse ( unsigned long long int i )
{
	unsigned long long int ret = 0;
	while ( i != 0 )
	{
		ret *= 10;
		ret += i % 10;
		i /= 10;
	}
	return ret;
}

bool palindrome ( unsigned long long int i )
{
	return ( i == reverse ( i ) );
}