Re: returning an address warning

I am getting a warning when I run this program, I am interested to
know why the compiler is warning.

thank you

**************** warning ****************
$ make clean; make
rm -rf *.o proj
g++ -c -o useful.o useful.cpp
useful.cpp: In member function 'int* count_rows_cols::get_counts()':
useful.cpp:31: warning: address of local variable 'x' returned
g++ -c -o useful_test.o useful_test.cpp
g++ -Wall -o proj useful.o useful_test.o

**************** useful.h ****************
#ifndef USEFUL_H
#define USEFUL_H
#include <string>

class count_rows_cols
{
  int nRows, nCol;
  std::string file_name;
  void set_No_of_Rows_Cols();

public:

  count_rows_cols(std::string const& fileName);
  ~count_rows_cols();

  int* get_counts();

};

#endif

**************** useful_h.cpp ****************
#include <string>
#include <fstream>
#include <iostream>
#include <sstream>
#include "useful.h"

using namespace std;

count_rows_cols::count_rows_cols( string const& fileName )
  : file_name( fileName ){
  nCol = 0;
  nRows = 1;
  set_No_of_Rows_Cols();
}
void count_rows_cols::set_No_of_Rows_Cols() {
  ifstream in(file_name.c_str());
  string line;
  getline(in, line);
  stringstream input( line.c_str() );

  string word;
  while(input >> word)
     nCol++; // init'd by constructor

  while (getline(in, line))
     nRows++; // init'd by constructor
}
count_rows_cols::~count_rows_cols() {}

int* count_rows_cols::get_counts(){
  int x[2];
  x[0] = nRows;
  x[1] = nCol;
  return x;

}

/*
std::string command = "wc -l";
std::system( ( command + " " + file_name ).c_str() );
}
*/

**************** useful_test.cpp ****************
#include <fstream>
#include <iostream>
#include <string>
#include "useful.h"

using namespace std;

int main() {
  string f = "address.txt";
  count_rows_cols x( f ); // space delimited
  int* vd = x.get_counts();
  cout << vd[0] << "\t" << vd[1] <<"\n";

}