Difficulty implementing chess board

Question

I need to implement the code that manages a chess board in ppm. It would be in the standard 8x8 format, with the option of the user to set the pixel number, the doubt would be when to loop to "multiply" the pixels. In the code below is coming out in the standard 8x8:

#include <stdio.h>

int main()
{
    int larg, alt;
    larg = alt = 8;

    printf("P2\n");
    printf("%d\t%d\n", larg, alt);
    printf("255\n");

    int i, j;
    int tamanho = 2;

    for(i = 0; i < larg; i++){
        for( j = 0; j < alt; j++){
            if((i + j) %2 != 0){
                    printf("0\t");
            }
            else{
                    printf("255\t");
            }
        }
        printf("\n");
    }
    return 0;
}

I hope that has been made clear, and I apologise in advance for any possible mistake, as this is my first question.

Answer 1

First I think you’re drawing the board starting with the columns, not the lines. But considering the board is square, it wouldn’t make a difference...

for(i = 0; i < larg; i++){
    for(k = 0; k < tamanho; k++){
        for( j = 0; j < alt; j++){
            for(l = 0; l < tamanho; l++){
                if((i + j) %2 != 0){
                        printf("0\t");
                }
                else{
                        printf("255\t");
                }
            }
        }
        printf("\n");
    }
}

I believe this should work.