#include<iostream>
using namespace std;
void input(int** arr, int n1, int n2)
{
    cout << "Заполните матрицу: ";
    for (int i = 0; i < n1; i++)
    {
        for (int j = 0; j < n2; j++)
            cin >> arr[i][j];
    }
}
void output(int** arr, int n1, int n2)
{
    for (int i = 0; i < n1; i++)
    {
        for (int j = 0; j < n2; j++)
            cout << arr[i][j] << ' ';
        cout << endl;
    }
}
int main()
{
    setlocale(0, "");
    int n1_1, n1_2, n2_1, n2_2;
    do
    {
        cout << "Введите размер первой матрицы: ";
        cin >> n1_1 >> n1_2;
        cout << "Введите размер второй матрицы: ";
        cin >> n2_1 >> n2_2;
        if (n1_2 != n2_1)
        {
            cout << "Данные матрицы невозможно перемножить.... " << endl;
        }
    } while (n1_2 != n2_1);

    int** ptr_arr1 = new int* [n1_1];
    for (int i = 0; i < n1_1; i++)
        ptr_arr1[i] = new int[n1_2];
    int** ptr_arr2 = new int* [n2_1];
    for (int i = 0; i < n2_1; i++)
        ptr_arr2[i] = new int[n2_2];
    int** ptr_arr3 = new int* [n1_1];
    for (int i = 0; i < n1_1; i++)
        ptr_arr3[i] = new int[n2_2];
    for (int i = 0; i < n1_1; i++)
        for (int j = 0; j < n2_2; j++)
            ptr_arr3[i][j] = 0;
    input(ptr_arr1, n1_1, n1_2);
    input(ptr_arr2, n2_1, n2_2);
    cout << endl;
    for (int i = 0; i < n1_1; i++)
        for (int j = 0; j < n2_2; j++)
            for (int k = 0; k < n1_2; k++)
                ptr_arr3 += ptr_arr1[i][k] * ptr_arr2[k][j];
    output(ptr_arr1, n1_1, n1_2);
    cout << endl;
    output(ptr_arr2, n2_1, n2_2);
    cout << " " << endl;
    output(ptr_arr3, n1_1, n2_2);
    for (int i = 0; i < n1_1; i++)
    {
        delete[] ptr_arr1[i];
        delete[] ptr_arr2[i];
        delete[] ptr_arr3[i];
    }
    delete[] ptr_arr1;
    delete[] ptr_arr2;
    delete[] ptr_arr3;
}