Change java code to c++ code

import java.util.*; public class MaxSubMatrix { static int[][] matrix; public static void main(String[] args){ Scanner s=new Scanner(System.in); System.out.println("Enter number of rows ="); int n =s.nextInt(); System.out.println("Enter number of columns = "); int m=s.nextInt(); s.nextLine(); System.out.println("enter row's elements of matrix separated by spaces"); matrix=new int[n][m]; for(int i=0;i