/prog/ - RPG

Lets program a roleplaying game together. Each post must contain either a new function or an edited version of an old function in psudocode. I will start:

int dealDamage(int hp, int damage){
    return hp - damage;
}

What's wrong with negative hit points or non-positive damage?

int dealDamage(int hp, int damage) {
    if (damage < 0)
        assert(hp <= INT_MAX + damage);
    else
        assert(hp >= INT_MIN + damage);
    return hp - damage;
}