Question

C++ question:

How would I make code that cin a dimension froma user between 3 to 11 and generate a tic tack toe grid? Should I set my array size to121 (an 11x11 grid) even if I don't use the entire array? Say the grid is only 3x3 then I would technically only use grid spaces 0-8 right?

It would look like this:

 ? | ? | ?
-----------
 ? | ? | ?
-----------
 ? | ? | ?

Answer 1

Solution:

In this problem use Two dimensional arrays instead of single dimension array so that instead of creating 121 size array create a grid or array based on the dimension that user enters . That means either create a single dimension array based on dimensions or create two dimension array .

For example if user enters the dimension 3 then create array size of 3 * 3 i.e 9 like this int grid[9]

in the similar way if we need better performance create two dimension array like int grid[3][3].

For better understanding refer the below code snippet:

Code:

#include <iostream>
using namespace std;
int main()
{
cout<<"Enter any dimension between 3 and 11: ";
int dim,i,j;
cin >> dim; //asking user to enter the dimensions of a grid
  
char two_dim_grid[dim][dim],single_dim_grid[dim*dim]; // create both single and two dimensions grid

for (i=0;i<dim*dim;i++)
single_dim_grid[i]='?'; //assign ? to each place in a single dimension grid

for (i=0;i<dim;i++)
{
for (j=0;j<dim;j++)
two_dim_grid[i][j]='?'; //assign ? to each place in a two dimension grid
}
  
cout << "Grid created Using single dimension array\n";
for (i=0;i<dim*dim;i++)
{
if (i%dim==0) //condition for new line
cout << "\n------\n";
cout << single_dim_grid[i] <<"|"; //print single dimension grid as a tic tack grid
}
  
cout << "\n\nGrid created Using two dimension array\n\n"; //print two dimension grid
for (i=0;i<dim;i++)
{
for (j=0;j<dim;j++)
cout << two_dim_grid[i][j] <<"|";
cout << "\n------\n";
}
return 0;
}
Code and Output Screenshots:

Note : if you have any queries please post a comment thanks a lot..always available to help you..