C Program 2D arrays with structs and pointers

C Program 2D arrays with structs and pointers

#include 
#include 

#define NUM_ROWS 20
#define NUM_COLS 20

#define WALL 0
#define FLOOR 1
#define PASS 1
#define NOT_PASS 0

typedef struct playerChar {
    int HP;
} PlayerChar;

//General struct with pointers to every type of 'creature' that can be shown on map
typedef struct charPointers {
    PlayerChar * pPointer;
} CharPointers;

int main (void) {
    initscr();
    noecho();
    curs_set(0);
    resize_term (NUM_ROWS, NUM_COLS);

    int i, j;
    int ** mapArray = (int **) malloc (NUM_ROWS * sizeof (int *));
    int ** passableArray = (int **) malloc (NUM_ROWS * sizeof (int *));
    int ** charLoc = (int **) malloc (NUM_ROWS * sizeof (int *));


    for (i = 0; i < NUM_ROWS; i++) {
        mapArray [i] = (int *) malloc (NUM_COLS * sizeof (int));
        passableArray [i] = (int *) malloc (NUM_COLS * sizeof (int));
        charLoc [i] = (int *) malloc (NUM_COLS * sizeof (CharPointers));
        for (j = 0; j < NUM_COLS; j++) {
            if (i == 0) {
                mapArray [i][j] = WALL;
                passableArray [i][j] = NOT_PASS;
            }
            else if (i == (NUM_ROWS - 1)) {
                mapArray [i][j] = WALL;
                passableArray [i][j] = NOT_PASS;
            }
            else if (j == 0) {
                mapArray [i][j] = WALL;
                passableArray [i][j] = NOT_PASS;
            }
            else if (j == (NUM_COLS - 1)) {
                mapArray [i][j] = WALL;
                passableArray [i][j] = NOT_PASS;
            }
            else {
                mapArray [i][j] = FLOOR;
                passableArray [i][j] = PASS;
            }
            charLoc[i][j].CharPointers.pPointer = NULL;
        }
    }