C言語で多相もどきとmap

map_func.c

#include <stdio.h>

#define map(TYPE, SOURCE, RESULT, FUNC)\
  TYPE RESULT[sizeof(SOURCE) / sizeof(SOURCE[0])] = {0};\
  for (int i = 0; i < (sizeof(SOURCE) / sizeof(SOURCE[0])); i++) {\
    RESULT[i] = FUNC(SOURCE[i]);\
  }

int square(int n) {
  return n * n;
}

double div_three(double n) {
  return n / 3.0;
}

int main(void) {
  int int_nums[] = {1, 2, 3, 4, 5};
  map(int, int_nums, result_s, square);
  for (int i = 0; i < 5; i++) {
    printf("%d ", result_s[i]);
  }
  printf("\n");

  double real_nums[] = {1.2, 2.3, 3.4, 4.5, 5.6};
  map(double, real_nums, result_d, div_three);
  for (int i = 0; i < 5; i++) {
    printf("%f ", result_d[i]);
  }
  return 0;
}

/**
 * $ ./map_func
 * 1 4 9 16 25
 * 0.400000 0.766667 1.133333 1.500000 1.866667
 */

これメモリ管理大丈夫なんか