Change java code to C++ code

package mat;
import java.util.Scanner;
public class Mat {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("J_Baris : ");
        int x = in.nextInt();
        String deret="";
        System.out.print("J_Kolom : ");
        int y = in.nextInt();
        int i,j;
        int a[][] = new int[x][y];
        for(i=0;i<x;i++)
        {
            for(j=i+1;j<y;j++)
            {
                
                System.out.print("<"+(i+1)+","+(j+1)+"> = ");
                a[i][j] = in.nextInt();
                deret+=(i+1)+""+(j+1);
                
            }
        }
        System.out.println(deret);
        char tempd[] = new char[deret.length()];
        tempd = deret.toCharArray();
        char angka ='1';
        int z=1;
        int benar=0;
        int d = deret.length();
        for(i=0;i<d;i++)
        {
            if(z<y && i==(d-1))
            {
                angka++;
                benar=0;
                i=0;
                z++;
            }
            else if(tempd[i]==angka && benar==1)
            {
                tempd[i]=' ';
            }
            else if(tempd[i]==angka)
            {
                benar++;
            }
        }
        for(i=0;i<deret.length();i++)
        {
            if(tempd[i]==' ')
            {
                tempd[i]=' ';
            }
        }
        String deret1 = new String(tempd);
        System.out.println(deret1);
    }
}