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

int reduce(const int* array, int size, int (*accumulator)(int, int)) {
    int value = 0;
    for (int i = 0; i < size; i++) {
        value = accumulator(value, array[i]);
    }
    return value;
}

int max(int left, int right) {
    return left > right ? left : right;
}

int sum(int left, int right) {
    return left + right;
}

int main(int argc, char* argv[]) {
    int numbers[] = { 5, 9, 81, 32, 14, 6, 1 };
    int numbers_len = sizeof(numbers) / sizeof(numbers[0]);

    int sum_of_numbers = reduce(numbers, numbers_len, sum);
    int max_number = reduce(numbers, numbers_len, max);

    printf("sum: %d\nmax: %d\n", sum_of_numbers, max_number);

    return EXIT_SUCCESS;
}
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