Câu 2

#include<iostream>
using namespace std;
int n = 3;
void input(int a[100][100])
{
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            cout << "a[" << i << "][" << j << "]= ";
            cin >> a[i][j];
        }
    }
}
void output(int a[100][100])
{
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            cout << a[i][j]<<" ";
        }
        cout << endl;
    }
}
void quay(int a[100][100])
{
    int temp[100][100];
    int tam = n - 1;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            temp[j][tam] = a[i][j];
        }
        tam--;
    }
    output(temp);
}
int main()
{
    int b[100][100];
    input(b);
    cout << "truoc khi quay: " << endl;
    output(b);
    cout << "sau khi quay: " << endl;
    quay(b);
    system("pause");
    return 0;
}