A simple Rock Paper Scissors game made in C++

RockPaperScissors.cpp

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <map>
#include <string>

int randMove() {
	return std::rand() % 3;
}

std::map<std::string, int>::iterator serachByValue(std::map<std::string, int> &mapOfWords, int val) {
    // Iterate through all elements in std::map and search for the passed element
    std::map<std::string, int>::iterator it = mapOfWords.begin();

    while (it != mapOfWords.end()) {
        if (it->second == val) {
        	return it;
        }

        it++;
    }

    return it;
}

int main() {
	srand(time(NULL));

	std::string banner = "Rock Paper Scissors Game\n";
	std::string playerChoice;
	std::map<std::string, int> weaponMap;

	weaponMap.insert(std::make_pair("r", 0));
	weaponMap.insert(std::make_pair("p", 1));
	weaponMap.insert(std::make_pair("s", 2));

	int winLoseMatrix[3][3] = {{-1, 1, 0},
                                   {0, -1, 1},
                                   {1, 0, -1}};

	std::cout << banner;
	std::cout << "Choose rock (r) paper (p) or scissors (s): ";
	std::cin >> playerChoice;
	std::cout << "\n" << "Okay, you chose " << playerChoice << "\n";
	
	int computerMove = randMove();
	int playerMove = weaponMap.find(playerChoice)->second;

	if (winLoseMatrix[playerMove][computerMove] == -1) {
		std::cout << "\n" << "It's a draw!" << "\n";
	}
	else if (winLoseMatrix[playerMove][computerMove] == 1) {
		std::cout << "\n" << "You Win!" << "\n";
	}
	else {
		std::cout << "\n" << "You Loose!" << "\n";
	}

	std::cout << "Computer chose " << serachByValue(weaponMap, computerMove)->first << "\n";
}