
Answer:
The C++ code is given below with appropriate comments
Explanation:
//Remove this header file if not using visual studio.
#include "stdafx.h"
//Include the required header files.
#include <iostream>
//Use for maths function.
#include <cmath>
using namespace std;
//Define main function
int main()
{
   // Define the variables
   double targetValue = 0.3333;
   double sensorReading = 0.0;
   //Perform the opeartion.
   sensorReading = 1.0 / 3.0;
   // Get the absolute floating point value and
   // Check up to 4 digits.
   if (fabs(sensorReading - targetValue) < 1E-4)
   {
       //Print equal if the values are close enough.
       cout << "Equal" << endl;
   }
   else
   {
       //Print not equal if the values are not         Â
       //close enough.
       cout << "Not equal" << endl;
   }
   system("pause");
   //Return the value 0.
   return 0;
}