How to use realloc in C
main.c
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[]) {
int* arr = malloc(sizeof(int) * 100);
printf("%p\n", arr);
// ...
int* res = realloc(arr, sizeof(int) * 10000000000);
printf("%p\n", res);
if (res == NULL) {
fprintf(stderr, "Failed to realloc\n");
free(arr);
return 1;
}
arr = res;
for (int i = 0; i < 8; i++) {
arr[i] = 11;
}
for (int i = 0; i < 8; i++) {
printf("%d ", arr[i]);
}
free(arr);
return 0;
}
