#include <stdio.h> #include <stdlib.h> int main() { // Allocate memory int *ptr; ptr = calloc(4, sizeof(*ptr)); // Write to the memory *ptr = 2; ptr[1] = 4; ptr[2] = 6; // Read from the memory printf("%d\n", *ptr); printf("%d %d %d", ptr[1], ptr[2], ptr[3]); return 0; }