I'm working on the first level of my game and I want to know how I can make the monster use a random attack on the player AND use the correct number of damage. Here is the data that I wrote for this part (I'm not including the whole code because the rest is useless):

void LevelStart(int XP, int Lvl, int NewXP, int AddXP, int NewLvl){
	int playerAttack;
		struct Hero player;
	struct Attacks playerAttacks;
	struct Attacks monsterAttacks;

	struct Monster easyLevelMonster;

	// Player attacks and stats
	
	player.health = 150;
	playerAttacks.attack1 = "FireBall";
	playerAttacks.attack2 = "Fire Slash";
	playerAttacks.attack3 = "Fire Barrage";
	playerAttacks.attack4 = "Blue Flame Bomb";
	playerAttacks.damageAttack1 = 4;
	playerAttacks.damageAttack2 = 9;
	playerAttacks.damageAttack3 = 14;
	playerAttacks.damageAttack4 = 19;

	// Monster attacks and stats
	
	easyLevelMonster.monsterCount = 1;
	easyLevelMonster.monsterType = "monster";
	easyLevelMonster.monsterHealth = 100;
	monsterAttacks.attack1 = "bash";
	monsterAttacks.attack2 = "Spin attack";
	monsterAttacks.attack3 = "Heavy punch";
	monsterAttacks.damageAttack1 = 10;
	monsterAttacks.damageAttack2 = 15;
	monsterAttacks.damageAttack3 = 20;

Tell me if you need more of the code to answer this. Please help me with this.