#include <iostream>

using namespace std;

int calc_sum(const int arr[], const int size) {
    int sum = 0;
    for (int i = 0; i < size; i++) {
        sum += arr[i];
    }
    return sum;
}

int calc_min(const int arr[], const int size) {
    int min = arr[0];
    for (int i = 0; i < size; i++) {
        if (arr[i] < min) {
            min = arr[i];
        }
    }
    return min;
}

void print(const int arr[], const int size) {
    for (int i = 0; i < size; i++) {
        cout << arr[i] << " ";
    }
    cout << endl;
}


void change(int& a, int& b) {
    int temp = a;
    a = b;
    b = temp;
}

int sum(const int a, const int b) {
    return a + b;
}

int square(const int a) {
    return a * a;
}

void square2(int& a) {
    a *= a;
}




int main() {

    int x = 10;
    int y = 20;

    int z = sum(x, y);

    cout << "1: " << sum(x, y) << endl;

    cout << "2: " << square(x) << endl;
    cout << "3: " << x << endl;

    square2(x);

    cout << "4: " << x << endl;


    const int size = 10;
    int arr[size]{ 1,2,4,6,8,0,6,12,5,4 };

    const int size2 = 9;
    int arr2[size2]{ 1,2,7,6,6,0,6,12,5 };

    const int size3 = 8;
    int arr3[size3]{ 1,2,17,6,8,12,16,12 };

    cout << "sum: " << calc_sum(arr, size) << endl;
    cout << "sum2: " << calc_sum(arr2, size2) << endl;
    cout << "sum3: " << calc_sum(arr3, size3) << endl;

    cout << "min: " << calc_min(arr, size) << endl;
    cout << x << " " << y << endl;
    change(x, y);
    cout << x << " " << y << endl;
}