beginner

[worthy hinge]

just started c++ a few months ago and got my first exam tomorrow. can someone help me with understanding multi dimensional arrays?

[livid estuary]

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[worthy hinge]

i don't understand how to make my code do, for example, a cube filled with x's and replace the left side one layer with "o"

[modern shell]

I’m assuming you can fill the multi-dimensional with “x” but I don’t understand what you mean exactly by the left side one layer with “o”.

For the left side part you mentioned, if your int i variable is iterating through your rows and int j variable is iterating through the columns you can do an if statement inside the two for loops to check if j < size_of_column / 2.

It would be easier to help you if you copied and pasted the code you’ve written down so far.

!format

[livid estuary]

Here.

#include <iostream>

const int size = 5;  // You can adjust the size of the cube

void drawCube() {
  char cube[size][size][size];  // 3D array for the cube

  // Fill the cube array with 'x' symbols
  for (int i = 0; i < size; ++i) {
    for (int j = 0; j < size; ++j) {
      for (int k = 0; k < size; ++k) {
        cube[i][j][k] = 'x';
      }
    }
  }

  // Draw the cube
  for (int i = 0; i < size; ++i) {
    for (int j = 0; j < size; ++j) {
      for (int k = 0; k < size; ++k) {
        std::cout << cube[i][j][k] << ' ';
      }
      std::cout << std::endl;
    }
  }
}

int main() {
  drawCube();

  return 0;
}

what should I do if i want to replace the entire left side with "o"'s instead?

brew

Formatted by nou

[modern shell]

// Draw the cube
  for (int i = 0; i < size; ++i) {
    for (int j = 0; j < size; ++j) {
      for (int k = 0; k < size; ++k) {
        std::cout << cube[i][j][k] << ' ';
      }
      std::cout << std::endl;
    }
    std::cout << std::endl;
  }
}

Adding another newline can help you see the cube. Try running before and after to see the difference

if you add an if statement before the std::cout << cube[i][j][k] and use the information I gave you from the previous message then make the std::cout << cube[i][j][k] an else statement you'll be able to solve it

Try it on your own and if you can't do it I'll give you the code

You'll have to change a few things since I gave you code for 2d array

[modern shell]

I don't know if you want it anymore since you haven't responded but here's the code

#include <iostream>

#include <iostream>

const int size = 5;  // You can adjust the size of the cube

void drawCube() {
    char cube[size][size][size];  // 3D array for the cube

    // Fill the cube array with 'x' symbols
    for (int i = 0; i < size; ++i) {
        for (int j = 0; j < size; ++j) {
            for (int k = 0; k < size; ++k) {
                cube[i][j][k] = 'x';
            }
        }
    }

    // Draw the cube
    for (int i = 0; i < size; ++i) {
        for (int j = 0; j < size; ++j) {
            for (int k = 0; k < size; ++k) {
                if (k < 2)
                    std::cout << 'o';
                else
                    std::cout << cube[i][j][k];
            }
            std::cout << std::endl;
        }
        std::cout << std::endl;
    }
}

int main() {
    drawCube();

    return 0;
}

[sturdy trellis]

I would recommend using std::array instead of C style arrays because std::array has bounds checking to prevent potential access violations