Tukukkk

I figured the following code would work, Here's an abridged version of my code:

#include <iostream>

#include <vector>



int main()

{

    int xCoordMovement, yCoordMovement;

    int rows, cols;

    char point = '*';



    std::cout << "enter number of rows";

    std::cin >> rows;

    cols = rows;



    std::vector<std::vector<char>> grid(rows, std::vector<char>(cols, '0'));

    std::vector<char> flattenedGrid;



    for (int x = 0; x < rows; x++)

    {

        for (int y = 0; y < cols; y++)

            std::cout << grid[x][y];

        std::cout << std::endl;

    }

    std::cout << "input for x coord: ";

    std::cin >> xCoordMovement;

    std::cout << "input for y coord: ";

    std::cin >> yCoordMovement;



    for (int x = 0; x < rows; x++)

        for (int y = 0; y < cols; y++)

            flattenedGrid.push_back(grid[x][y]);



    flattenedGrid[((cols * yCoordMovement) - (rows - xCoordMovement)) - 1] = point;



    std::cout << flattenedGrid.size() << std::endl;



    for(int i = 0; i < flattenedGrid.size(); i++)

        std::cout << flattenedGrid[i];



    std::cout << std::endl;



    for (int x = 0; x < rows; x++)

        for (int y = 0; y < cols; y++)

           for (int i = 0; i < flattenedGrid.size(); i++)

                grid[x][y] = flattenedGrid[i];





    for (int x = 0; x < rows; x++)

    {

        for (int y = 0; y < cols; y++)

            std::cout << grid[x][y];

        std::cout << std::endl;

    }



    std::cin.ignore();

    std::cin.get();



    return 0;

}

However it does not seem to change the values of the grid, it should now have a value that is a star at one of it's coordinates, but alas, all grid contains is it's original values.

relevant output:

00000 

00000 

00000 

00000 

00000

desired output:

00000

000*0

00000

00000

00000

Here is the bit I was hoping would assign the values of my vector into my vector of vectors:

for (int x = 0; x < rows; x++)

    for (int y = 0; y < cols; y++)

        for (int i = 0; i < flattenedGrid.size(); i++)

            grid[x][y] = flattenedGrid[i];

There are a couple of changes you have to make to the code:

• First, when you assign point to an element of flattenedGrid

Change:

 flattenedGrid[((cols * yCoordMovement) - (rows - xCoordMovement)) - 1] = point;

to:

flattenedGrid[(yCoordMovement) + (rows * xCoordMovement)] = point;

• Second, when you refill grid with elements of flattenedGrid

Change:

for (int x = 0; x < rows; x++)

    for (int y = 0; y < cols; y++)

        for (int i = 0; i < flattenedGrid.size(); i++)

             grid[x][y] = flattenedGrid[i];

to:

for (int x = 0; x < rows; x++)

        for (int y = 0; y < cols; y++)          

                grid[x][y] = flattenedGrid[rows * x + y];