/* * By: Pers * Date: June 4, 2017 * * Description: The purpose of this program is to simulating damage effect during a combat situation to an item (player's shield) in a game. Here, instead of increasing the damage done to an item by a fixed amount for a given enemy and weapon, it's going to varies depending on how badly it has already been damaged. Exponential damage function is responsible for calculating extra damage based on current condition of shield */ #include // std::cout, std::cin, std::endl #include // rand(), srand() #include // std::vector #include // expf() #include // time() using std::cout; using std::cin; using std::endl; using std::vector; // Prototypes int dmg(int powPoint, int wpnPoint, int shldPoint, int strikeCnt); float extraDmg(float c); int main() { srand(time(0)); // seeding random number generator int shieldPt = 100; // as default cout << "// Military Zone! -- Shield Damage Sim \\\\\n\n"; int powerPt = 5 + rand() % (21 - 5); // Enemy's power points range: [5 - 20] int weaponPt = 5 + rand() % (16 - 5); // Enemy's weapon points range: [5 - 15] int attackCnt = -1; vector statsVec; // Holds each attack damage points to produce a report statsVec.reserve(16); // reserve capacity as 16 integer cout << "\nAttention! Simulation is starting with the following values...\n"; cout << "--------------+---------\n"; cout << "| Shield | " << shieldPt << " Pt" << endl; cout << "| Enemy Power | " << powerPt << " Pt" << endl; cout << "| Weapon rate | " << weaponPt << " Pt" << endl; cout << "--------------+---------\n\n"; while(shieldPt > 0) { ++attackCnt; shieldPt = dmg(powerPt,weaponPt,shieldPt, attackCnt); statsVec.push_back(shieldPt); // stores each return value } cout << "\nGenerating damage report...\n\n"; for (int i = 0; i < statsVec.size(); ++i) { cout << "Attack #" << i + 1; cout << ": Shield point reduced to = " << statsVec.at(i); cout << endl; } cout << endl; } // Damage function // total damage = base damage + extra damage; // base damage = enemy power points + weapon damage rates // Extra damage = 2.10999 * ( e ^ (3.87937 * attack count) - 1 ) int dmg(int powPoint, int wpnPoint, int shldPoint, int strikeCnt) { int baseDmg = powPoint + wpnPoint; float c = strikeCnt / 10.0f; // convert the range to [0.0 - 1.0] float incDmg = extraDmg(c); cout << "Attack #" << strikeCnt + 1 << " extra damage = " << incDmg << endl; shldPoint -= (baseDmg + incDmg); return shldPoint; } // Additioal damage function (exponential) float extraDmg(float c) { float addDmg = 2.10999f * ( expf(3.87937 * c) - 1.0f ); return addDmg; }

Exponential damage system for games