C++ Simulates Int Memory

IntCell.cpp

#include "IntCell.h"

IntCell::IntCell( int initialValue ) : storedValue{ initialValue }
{
}

int IntCell::read( ) const
{
    return storedValue;
}

void IntCell::write( int x )
{
    storedValue = x;
}

IntCell.h

#ifndef IntCell_H
#define IntCell_H

/**
 * A class for simulating an integer memory cell.
 */
class IntCell
{
  public:
    explicit IntCell( int initialValue = 0 );
    int read( ) const;
    void write( int x );
    
  private:
    int storedValue;
};

#endif

TestIntCell.cpp

#include <iostream>
#include "IntCell.h"
using namespace std;

int main( )
{
    IntCell m;   // Or, IntCell m( 0 ); but not IntCell m( );

    m.write( 5 );
    cout << "Cell contents: " << m.read( ) << endl;

    return 0;
}