lesson10

#include <iostream>
#include <time.h>

using namespace std;


void summArray() {
    const int size = 5;
    const int min_val = -50;
    const int max_val = 50;
    int arr1[size];
    int arr2[size];
    int arr3[size];

    srand(time(NULL));

    for (int k = 0; k < size; ++k) {
        arr1[k] = rand() % (max_val - min_val + 1)
            + min_val;
        arr2[k] = rand() % (max_val - min_val + 1)
            + min_val;
    }

    for (int k = 0; k < size; ++k) {
        arr3[k] = arr1[k] + arr2[k];
    }

    cout << "arr1: ";
    for (int k = 0; k < size; ++k) {
        cout << arr1[k] << " ";
    }
    cout << endl;

    cout << "arr2: ";
    for (int k = 0; k < size; cout << arr2[k++] << " ");
    cout << endl;

    cout << "arr3: ";
    for (int k = 0; k < size; ++k) {
        cout << arr3[k] << " ";
    }
    cout << endl;
}

void shiftArray(int shift) {
    const int size = 5;

    while (shift < 0)
        shift += size;

    while (shift > size)
        shift -= size;


    int arr1[size]{1, 2,3,4,5};
    int arr2[size];
    for (int k = 0; k < size; k++) {
        arr2[k] = arr1[(k + shift) % size];
        /*
        if (k + shift < size)
            arr2[k] = arr1[k + shift];
        else
            arr2[k] = arr1[k + shift - size];
            */
    }

    for (int k = 0; k < size; ++k) {
        cout << arr1[k] << "\t" << arr2[k] << endl;
    }
}

void slideSum() {
    const int size = 5;
    int arr1[size]{ 1, 2,3,4,5 };
    int arr2[size];
    arr2[0] = arr1[0];
    for (int k = 1; k < size; ++k)
        arr2[k] = arr2[k - 1] + arr1[k];

    for (int k = 0; k < size; ++k) {
        cout << arr1[k] << "\t" << arr2[k] << endl;
    }
}

void getNegativePositive() {
    const int size = 15;
    const int min_val = -25;
    const int max_val = 25;
    int arr1[size];
    for (int k = 0; k < size; ++k) {
        arr1[k] = rand() % (max_val - min_val + 1)
            + min_val;
    }
    cout << "arr1: ";
    for (int k = 0; k < size; ++k) {
        cout << arr1[k] << " ";
    }
    cout << endl;

    int positive = 0, negative = 0;
    for (int k = 0; k < size; ++k) {
        if(arr1[k] > 0)
            positive++;
        else if (arr1[k] < 0)
            negative++;
    }
    cout << "pos: " << positive << ", neg: " << negative << endl;
    cout << "zero: " << size - (positive + negative) << endl;
}

void multyTab() {
    const int size1 = 9;
    const int size2 = 5;
    int tab[size1][size2];

    for (int k = 0; k < size1; k++) {
        for (int n = 0; n < size2; n++) {
            tab[k][n] = (k + 1) * (n + 1);
        }
    }

    for (int n = 0; n < size2; n++) {
        for (int k = 0; k < size1; k++) {
            cout << tab[k][n] << "\t";
        }
        cout << endl;
    }
}


void sumDiag() {
    const int size = 5;

    const int min_val = -100;
    const int max_val = 100;
    srand(time(NULL));

    double arr[size][size];
    for (int k = 0; k < size; k++)
        for (int n = 0; n < size; n++)
            arr[k][n] = (rand() % (max_val - min_val + 1) + min_val) / 100.0;

    for (int k = 0; k < size; k++) {
        for (int n = 0; n < size; n++)
            cout << arr[k][n] << "\t";
        cout << "\n";
    }

    double sum{0}; // double sum = 0
    for (int k = 0; k < size; k++) {
        for (int n = 0; n < size; n++) {
            if (n == k)
                sum += arr[n][k];
        }
    }

    double sum1{ 0 };
    for (int k = 0; k < size; k++) {
        sum1 += arr[k][k];
    }

    cout << "sum: " << sum << endl;
    cout << "sum1: " << sum1 << endl;
}

void sqrTab() {
    const int size = 5;

    const int min_val = -10;
    const int max_val = 10;
    srand(time(NULL));

    double arr[size][size];
    for (int k = 0; k < size; k++) {
        for (int n = 0; n < size; n++) {
            arr[k][n] = (rand() % (max_val - min_val + 1) + min_val);
            cout << arr[k][n] << "\t";
        }
        cout << "\n";
    }

    double arr2[size][size];
    for (int k = 0; k < size; k++)
        for (int n = 0; n < size; n++)
            arr2[k][n] = arr[k][n] * arr[k][n];

    cout << endl;
    for (int k = 0; k < size; k++) {
        for (int n = 0; n < size; n++)
            cout << arr2[k][n] << "\t";
        cout << "\n";
    }
}

void main() {
    //shiftArray(-101);
    //slideSum();
    //getNegativePositive();
    //multyTab();
    //sumDiag();
    sqrTab();
}