Fibonacci sequence generator. Use an int array to store the results.

#include <stdio.h>
#include <stdlib.h>

long fib(int n) {
 int *fib_num;
 fib_num = (int*)calloc(n, sizeof(int));
 fib_num[0] = 1;
 fib_num[1] = 1;
 if (n <= 1) {
   return 1;
 } else {
   for (int i = 2; i < n; i++) {
     fib_num[i] = fib_num[i-1] + fib_num[i-2];
   }
   return fib_num[n-1];
 }
}

int main() {
  int n = 10;
  printf("%ld\n", fib(n));
}