Simple array question

Hello,

I'm new to c++ and I'm having a play around with arrays and I'm trying to figure something out.

For this little game I'm trying to have it so that a random element of the array is selected and put into he variable 'Gold'. I'm scratching my head trying to figure out how to get it work.

So far I have: -

// ChestTest1.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "math.h"
#include <Windows.h>
#include <iostream>
#include <fstream>
#include <string>
#include <time.h>
using namespace std; 


// Variables
int Gold=0;
int Chest[5]={10, 20, 30, 40, 50};


// Function
void LootChest()
{
	// Generates random number between 0-4 to give player when chest looted
	srand( (unsigned)time(0) );
	int ChestRoll=0;
	ChestRoll=rand() % 5;
}

int main()
{
	cout<<"The chest gave you "<<Gold<<" gold."<<endl;
	return 0;
}

I'm not quite sure how to get the output of 'ChestRoll' to take that number element of 'Chest[]' and put it into the int called 'Gold'.

Any help or direction would be appreciated =)

Last edited on

Codermik (835)

First off, only set your seed once at the start of your program.

Basically grab a random number between 0 and 4, remember arrays start at 0. Use that number as an index to your array and get its number. i.e.

result = Chest[ChestRoll];

Last edited on

BHX (3450)

Already answered, but this is what I had thrown together off what you wanted.

#include <iostream>
#include <cstdlib>

int LootChest()
{
	int chestRoll = rand() % 5;
	return chestRoll;
}

int main()
{
	srand((unsigned)time(0));
	
	int chest[5] = {10, 20, 30, 40, 50};
	int gold = 0;
	
	int index = LootChest();
	gold = chest[index];

        // also could have done:
        // gold = chest[LootChest()] ;
	std::cout << "The chest gave you " << gold  << " gold." << std::endl;
	
	return 0;
}

Last edited on

JockX (293)

Make use of return keyword, and return looted gold from LootChest function.

int Chest[5]={10, 20, 30, 40, 50};

int LootChest()
{
    int ChestRoll=rand() % 5;
    return Chest[ChestRoll];
}

int main()
{
    srand( (unsigned)time(0) ); // only needed once per program life
    cout<<"The chest gave you "<< LootChest() <<" gold."<<endl;
    return 0;
}

Then you can think of going one step further - making function int LootChest(int* Chest) that you can use with different chests, containg different treasures:

int CommonChest []   = {1, 5, 10, 20};
int NoblemanChest [] = {10, 50, 100, 200};
int EpicChest[]      = {100, 500, 1000, 2000};

 cout<<"The CommonChest gave you "  << LootChest(CommonChest)   <<" gold."<<endl;
 cout<<"The NoblemanChest gave you "<< LootChest(NoblemanChest) <<" gold."<<endl;
 cout<<"The EpicChestgave you "     << LootChest(EpicChest)     <<" gold."<<endl;

Last edited on

brokenmachine85 (18)

That's great guys =)

I'll have a bit of a play around with all that.

Really appreciated, thanks again!

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