// Public domain / CC0. Use freely for any purpose. RoyR 2026
// arrays.cm - Array operations
// Demonstrates: arrays, loops, array initialization

void printf(uint8 *fmt);

int32 sum_array(int32 *arr, int32 len) {
    int32 total = 0;
    for (int32 i = 0; i < len; i = i + 1) {
        total = total + arr[i];
    }
    return total;
}

void reverse_array(int32 *arr, int32 len) {
    int32 i = 0;
    int32 j = len - 1;
    while (i < j) {
        int32 temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
        i = i + 1;
        j = j - 1;
    }
}

int32 main(void) {
    int32 numbers[10] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
    
    printf("Original array: ");
    for (int32 i = 0; i < 10; i = i + 1) {
        printf("%d ", numbers[i]);
    }
    printf("\n");
    
    int32 total = sum_array(numbers, 10);
    printf("Sum: %d\n", total);
    
    reverse_array(numbers, 10);
    
    printf("Reversed array: ");
    for (int32 i = 0; i < 10; i = i + 1) {
        printf("%d ", numbers[i]);
    }
    printf("\n");
    
    return 0;
}