Rotirea unei matrici 90 stanga dreapta

// rotirea dreapta si stanga 90


#include <iostream>

using namespace std;

int main()
{
    int a[100][100],n,i,j,b[100][100],c[100][100];
    cout<<"n= ";cin>>n;
    for (i=1;i<=n;i++)
    for (j=1;j<=n;j++)
        cin>>a[i][j];

cout<<"Matricea initiala";
cout<<'\n';

    for (i=1;i<=n;i++)
    {for (j=1;j<=n;j++)
    cout<<a[i][j]<<" ";
    cout<<'\n';}

cout<<'\n';

cout<<"Rotita la drapta cu 90 de grade";
cout<<'\n';
    for (i=1;i<=n;i++)
    for (j=1;j<=n;j++)
    b[i][j]=a[n+1-j][i];
    for (i=1;i<=n;i++)
    {for (j=1;j<=n;j++)
    cout<<b[i][j]<<" ";
    cout<<'\n';}

    cout<<'\n';

    cout<<"Rotita la stanga cu 90 de grade";
    cout<<'\n';
    for (i=1;i<=n;i++)
    for (j=1;j<=n;j++)
    c[i][j]=a[j][n-i+1];
    for (i=1;i<=n;i++)
    {for (j=1;j<=n;j++)
    cout<<c[i][j]<<" ";
    cout<<'\n';}

    return 0;
}