Vector Iterators and Dynamic Memory Allocation

//C++ Vector Iterations and Dynamic Memory: By Ben Bollinger

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

using namespace std;

char askYesNo(string myQuestion);
char attackDefend(string question);
string changeWeapon(vector<string> weapon);

int main()
{
    //Create weapon choice:
    vector<string> inv;
    inv.push_back("sword");
    inv.push_back("knife");
    inv.push_back("gun");

    //Declare vector iteratiors:
    vector<string>::iterator myIter;
    vector<string>::const_iterator iter;

    cout << "Your Items:\n";
    cout << "-----------\n";

    //List out items:
    for(iter = inv.begin(); iter != inv.end(); iter++)
    {
        cout << *iter << endl;
    }

    cout << "-----------\n";

    //Let user select weapon:
    string userWeapon;
    string change = changeWeapon(inv);
    {
        if(change == "sword")
        {
            cout << "You chose sword\n";
            userWeapon = "sword";

        }else if(change == "knife")
        {
            cout << "You chose knife\n";
            userWeapon = "knife";

        }else if(change == "gun")
        {
            cout << "You chose gun\n";
            userWeapon = "gun";
        }else
        {
            //Set random weapon if user types invalid input:
            srand(static_cast<unsigned int>(time(0))); //Seed random number with time.
            int rndWeapon = rand() % 3 + 1; //Generate number.
            int realNum = rndWeapon;

            //Decision structure:
            if(realNum == 1)
            {
                userWeapon = "sword";

            }else if(realNum == 2)
            {
                userWeapon = "knife";

            }else if(realNum == 3)
            {
                userWeapon = "gun";
            }

            cout << "Invaid Option, your weapon is now: " << userWeapon << "\n";
        }
    }

    //Setup first enemy attack
    char enemy1 = attackDefend("Enemy attacks, do you 'attack' or 'defend'?");
    {
        if(enemy1 == 'a'){

            if(userWeapon == "sword")
            {
                cout << "You perished\n"; //If sword, then death.

            }else if(userWeapon == "knife")
            {
                cout << "You never stood a chance\n"; //If knife, then death.

            }else if(userWeapon == "gun")
            {
                cout << "You killed the enemy\n"; //If gun, then success.
            }

        }else if(enemy1 == 'd'){
            cout << "Your defenses were breached\n"; //If defend, then death.
        }
    }

    //Ask user to create a new weapon:
    char createWeapon = askYesNo("Create a weapon?");
    {
        if (createWeapon == 'y')
        {
            int replaceWeap;
            cout << "What weapon do you want to replace? (1: sword, 2: knife, 3: gun): ";
            cin >> replaceWeap; //Set weapon to replace.

            string newWeap;
            cout << "New weapon name: ";
            cin >> newWeap; //Set name of new weapon.

            //Weapon replace logic:
            myIter = inv.begin() + replaceWeap - 1;
            string oldWeap = *myIter;
            *myIter = newWeap;

            cout << "\n++++++++++++++++++++\n";
            cout << "Successfuly replaced '" << oldWeap << "' with '" << newWeap << "'\n";
            cout << "++++++++++++++++++++\n";

            //Display new item set:
            cout << "\nNew Items: \n";
            cout << "------------\n";
            for(iter = inv.begin(); iter != inv.end(); iter++)
            {
                cout << *iter << endl;
            }
            cout << endl;

        }else
        {
            cout << "Game Over" << endl;
        }
    }
}

//Enemy attack function:
char attackDefend(string question)
{
    char response;
    cout << question << " (a/d): ";
    cin >> response;

    return response;
}


//Change user weapon function:
string changeWeapon(vector<string> inventory)
{
    string weapon;
    string choice;
    cout << "Enter what weapon you would like to use: ";
    cin >> choice;

    for(int i = 0; i < inventory.size(); i++)
    {
        if(choice == inventory[i])
        {
            weapon = choice;
        }
    }
    return weapon;
}

//Ask a question function:
char askYesNo(string myQuestion)
{
    char answer;
    cout << myQuestion << " (y/n): ";
    cin >> answer;

    return answer;
}