#include #include using namespace std; // header() - Print out some header information containing de name of the program void header() { cout << "The Monty Hall Game Show" << endl; cout << "========================" << endl; } // putCar() - Put the car behind 1 of the 3 doors randomly int putCar() { return rand()%3+1; } // pickDoor() - Choose 1 of 3 doors where YOU think the car is behind int pickDoor() { return rand()%3+1; } // openDoor() - Open 1 of the 2 other doors randomly int openDoor(int yourChoice) { int door = yourChoice; while(door==yourChoice) door = rand()%3+1; return door; } // keepChoice() - Make a doorswitch or not, if 1, pick last door, if 0, keep yourChoice int keepChoice(int yourChoice, int openedDoor) { if(rand()%2) return 6-yourChoice-openedDoor; else return yourChoice; } // main() - Main program int main() { srand((unsigned)time(NULL)); int percWinNC = 0, percWinCH = 0, percLost = 0; // print header header(); for(int i=0; i<10000; i++) { int nmbr = rand()%3+1; int car = putCar(); int choice = pickDoor(); int door = openDoor(choice); int final = keepChoice(choice, door); if(choice==final && choice==car) percWinNC++; else if(choice!=final && final==car) percWinCH++; else percLost++; } cout << " .Probability of winning, no change: " << percWinNC/100.0 << "%" << endl; cout << " .Probability of winning, after change: " << percWinCH/100.0 << "%" << endl; cout << " .Probability of losing: " << percLost/100.0 << "%" << endl; }