Pass a 2d array from c++ to MATLAB and back

I am trying to pass a 2D array, created in C++ of type int, to MATLAB and back using the included "engine.h" header. So far, I have been looking at different solutions around and none of them worked. I followed this one: https://www.mathworks.com/matlabcentral/newsreader/view_thread/309933 and am still unable to pass the 2D array.

Here is my code:

#include <cmath>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "engine.h"
#include "matrix.h"

int main(){
  //C++
  int numRows = 3;
  int numCols = 2;
  int M[numRows][numCols] = {{1,2},{4,5},{6,7}};

  //MATLAB
  Engine *ep;
  mxArray *T = NULL; 
  void *result = NULL;
  int *ans = NULL;
  
  T = mxCreateNumericMatrix(numCols, numRows, mxINT32_CLASS, mxREAL);
    
  if (T == NULL){
      printf("Something is wrong with T.\n");
      return 1;
     }

       memcpy(mxGetData(T),M,sizeof(M));
       engPutVariable(ep,"T",T);
       engEvalString(ep,"T=T';"); //gives the tranpose matrix

       //Get T back from MATLAB      
      //test Matlab array

      result = engGetVariable(ep,"T");
      mwSize nRow= mxGetM(result);
      mwSize nCol = mxGetN(result);
      ans = mxGetData(result);

      for (int j = 0; j<nCol; j++){
        for (int i = 0; i<nRow; i++){
          printf("%i\t",ans[nCol*i+j]);
        }
        printf("\n");
      }

      //engEvalString(ep,"f = plot(T);");

      mxDestroyArray(T);
       mxDestroyArray(result);
       engClose(ep);

return 0;

}

The error that I got is: invalid conversion from ‘void*’ to ‘mxArray* {aka mxArray_tag*}’ [-fpermissive] mxDestroyArray(result). Actually, most of the errors seem to originate around this block of codes here:

      result = engGetVariable(ep,"T");
      mwSize nRow= mxGetM(result);
      mwSize nCol = mxGetN(result);
      ans = mxGetData(result);
I tried to do:  mxArray *result.  This doesn't help.  Please let me know what can I do, and any help would be extremely appreciated.

Thanks.