Embedded C Output Behavior

During an ALTEN México embedded systems interview you're handed this small C program running on a test bench.

#include <stdio.h>

int compute(int a, int b) {
    int result = a++ + ++b;
    return result;
}

void print_values(int arr[], int n) {
    for (int i = 0; i < n; i++) {
        printf("%d ", arr[i]);
    }
    printf("
");
}

int main() {
    int x = 5, y = 10;
    int r = compute(x, y);

    int values[3];
    int j = 0;
    for (int i = 0; i < 3; i++) {
        values[j] = i * 2;
        j++;
    }

    printf("r = %d
", r);
    printf("x = %d, y = %d
", x, y);
    print_values(values, 3);

    return 0;
}

Describe exactly what this program does and what it prints to the console.