/**
 * Input:
 *   cth    : chance to hit, 0-100.
 *   karma  : the player's karma rating before attacking
 * Output:
 *   karma  : the player's karma rating after attacking
 *   return : whether or not this attack hit
 */
bool attack(int cth, int& karma)
{
	int rng = rand() % 100;
	int revise_cth = max(5,min(95,cth+karma*min(cth,100-cth)/100));
	bool hit = (rng < revised_cth);

	//update karma
	if(hit)
		karma -= (100-cth); //chance to miss
	else
		karma += cth;

	return hit;
}