inplace-rotation.cc

// Deepak Aggarwal, Coding Blocks
// deepak@codingblocks.com
#include <iostream>
using namespace std;
void inputMat(char mat[][10], int m, int n){
    for(int r = 0; r < m; ++r){
        for(int c = 0; c < n; ++c){
            cin >> mat[r][c];
        }
    }
}
void outputMat(char mat[][10], int m, int n){
    cout << "\n-----MAT Begins----\n";
    for(int r = 0; r < m; ++r){
        for(int c = 0; c < n; ++c){
            cout << mat[r][c] << " ";
        }
        cout << endl;
    }
    cout << "-----MAT Ends------\n";
}
void rotateMat(char mat[][10], int n){
    for(int rot = 0; rot < n / 2; ++rot){
        for(int j = rot; j < n - 1 - rot; ++j){
            char tmp = mat[rot][j];
            swap(tmp, mat[j][n-1-rot]);
            swap(tmp, mat[n-1-rot][n-1-j]);
            swap(tmp, mat[n-1-j][rot]);
            swap(tmp, mat[rot][j]);
        }
    }
}
int main(){
    char mat[10][10];
    int n;cin >> n;
    inputMat(mat, n,n);
    outputMat(mat, n, n);
    rotateMat(mat, n);
    outputMat(mat, n, n);
       
}