#include <stdio.h>
#include <stdlib.h>
int array_unique(int* arr, int size, int** result, int* result_size) {
int* temp = (int*)malloc(size * sizeof(int));
if (temp == NULL) {
return 0;
}
int idx = 0;
for (int i = 0; i < size; i++) {
int found = 0;
for (int j = 0; j < idx; j++) {
if (arr[i] == temp[j]) {
found = 1;
break;
}
}
if (!found) {
temp[idx++] = arr[i];
}
}
*result = (int*)malloc(idx * sizeof(int));
if (result == NULL) {
free(temp);
return 0;
}
for (int i = 0; i < idx; i++) {
(*result)[i] = temp[i];
}
*result_size = idx;
free(temp);
return 1;
}
int main() {
int arr[] = {1, 2, 1, 1, 3, 3, 4, 4, 5, 5, 5, 5, 6, 7, 7, 8};
int* result;
int result_size;
int rv = array_unique(arr, sizeof(arr) / sizeof(arr[0]), &result, &result_size);
if (rv == 0) {
puts("Error in array_unique()");
return -1;
}
for (int i = 0; i < result_size; i++) {
printf("%d ", result[i]);
}
printf("\n");
free(result);
return 0;
}
/*
run:
1 2 3 4 5 6 7 8
*/
