C++: Rotate Matrix to the right.

Given a square matrix and we need to write a program to rotate the matrix to the right. Here is the code for the program.

	#include <bits/stdc++.h>
	using namespace std;
	#define R 4
	#define C 4
	void rotateMatrix(int m, int n, int mat[R][C]) {
	int row = 0, col =0;
	int curr, prev;
	while(row<m && col<n) {
	if(row+1 == m || col+1 == n)
	break;
	prev = mat[row+1][col];
	for(int i= col; i<n; i++) {
	curr = mat[row][i];
	mat[row][i] = prev;
	prev = curr;
	}
	row++;
	for(int i=row; i<m; i++) {
	curr = mat[i][n-1];
	mat[i][n-1] = prev;
	prev = curr;
	}
	n--;
	if(row<m) {
	for(int i= n-1; i>=col; i--) {
	curr = mat[m-1][i];
	mat[m-1][i] = prev;
	prev = curr;
	}
	}
	m--;
	if(col<n){
	for(int i=m-1; i>=row; i--) {
	curr = mat[i][col];
	mat[i][col] = prev;
	prev = curr;
	}
	}
	col++;
	}
	for(int i=0; i<R; i++) {
	for(int j=0; j<C; j++)
	cout<<mat[i][j]<<" ";
	cout<<endl;
	}
	}
	int main() {
	int mat[R][C] = {{1,2,3,4}, {5,6,7,8}, {9,10,11,12}, {13,14,15,16}};
	rotateMatrix(R,C,mat);
	return 0;
	}

view raw rotate_mat_r.cpp hosted with ❤ by GitHub

Output:
5    1    2    3
9    10   6    4
13   11   7    8
14   15   16   12