C++: Print a Matrix in Spiral Form

We are given a matrix of any dimension, say 3x3, 4x4 or 4x3, and we are required to print the elements of the matrix in spiral form.

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

view raw matrix_spiral.cpp hosted with ❤ by GitHub

Output: 1 2 3 4 8 12 11 10 9 5 6 7