allocate matrix in C

Question

i want to allocate a matrix.

is this the only option:

int** mat = (int**)malloc(rows * sizeof(int*))

for (int index=0;index

        

Answer 1

For a N-Dimensional array you can do this:

int *matrix = malloc(D1 * D2 * .. * Dn * sizeof(int)); // Di = Size of dimension i

To access a array cell with the typical way you can do this:

int index = 0;
int curmul = 1;
int i;
int indexes = {I1, I2, ..., In}; // Ii = Index in dimension i

for(i = N-1; i >= 0; i--) {
    index = index + indexes(i) * curmul;
    curmul = curmul * Di;
}

(Note: didnt test now but should work. Translated from my Matlab code, but in Matlab index starts from 1, so i MAY made a mistake (but i dont think so))

Have fun!