gistfile1.c

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

int inject_array(int *array, int size, int init,
                  int (^block)(int sum, int value)) {
   for (int i = 0; i < size; i++)
      init = block(init, array[i]);
   return init;
}

int main(int argc, char **argv) {
   int array[] = {
      30, 60, 17, 120, 42, 25, 32, 47,
      93, 75, 88, 230, 1270, 300, 400,
      224, 440, 89, 330, 1, -100, 5052
   };

   int tab_size = sizeof(array) / sizeof(int);

   int prod = inject_array(array, 5, 1, ^(int res, int val) {
      return res * val;
   });

   printf("%d\n", prod);

   return 0;
}