Argthtjtr

So, I have a code when I prompt the user to enter a number, I want the size of the 2D array to be changed according to what the user entered, for example:

Enter a number between 1 and 12:
3

The 2D array then will change according to that size to become a 3x3 2D array, I hope I am as clear as I could be, I would really appreciate it if someone can please guide me to a solution, Thank you everyone !!

#include <iostream>

#include <cstdio>

#include <cmath>

#include <cstdlib>



using namespace std;



double Atemp = 0;

double Utemp = 0;

double Working = 0;

double Total = 0;

char Answer = 'x';

int Umain;







void displayOverview ();



void playOrQuit();



void promptNumber();



void fillUserArray(char grid);



int main(){



    displayOverview();



    playOrQuit();



    promptNumber();





    return 0;

}



void displayOverview(){



   }



void playOrQuit(){



    string playOrNot;



    cout << "If you want to play please press 'p' for play, and 'q' if you wish to quitn";

    cin >> playOrNot;



    if(playOrNot == "p"){

        cout << "Awesome, lets start playing !!! n";



    }if(playOrNot == "q"){

        cout << "Alright then, see you soon !!n";

        exit(0);

    }if(playOrNot != "p" && playOrNot != "q"){

        cout << "Invalid entry !!n";

        exit(0);

    }

}





void promptNumber(){



    do{

    cout << "Please Enter numbers between 1 and 12: ";

    cin >> Umain;

    if(Umain <= 12){

            for (Utemp = Umain; Utemp > 0; Utemp--){

            cout << "Please enter a number: ";

            cin >> Atemp;

        }

        }else{

            cout << "Not within limit :(n";

        }

    }while (Answer == 'y');

}



void fillUserGrid (char grid){



    for( int row = 0; row < Umain; row++ ) {

        for(int col = 0; col < Umain; col++){

            grid[row][col] = userInput.at( row * Umain + col );

        }

    }

}



void outputUserGrid(char grid){



    for (int row = 0; row < Umain; row++){

        for(int col = 0; col < Umain; col++){

              cout << grid[row][col]<<" ";

        }

    cout << endl;

  }

}

It's quite legitimate to just use a 12x12 array for your game. When the user wants to play on a smaller grid, you can just use part of it.

The only times this might be an issue are if you're running into L1/L2 cache issues for performance-critical programs, or if you're storing lots of these grids and need to reduce memory use. I would be surprised if either of these scenarios applies to you.