How Can I Get This Code To: a.) Use sentinel-controlled repetition (while statem

Question

How Can I Get This Code To:

a.) Use sentinel-controlled repetition (while statements) to allow the user to enter more than one set integers for calculations and comparisons.

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#include <iostream>
#include <fstream>
#include <iomanip>

using namespace std;
int main()
{

int a,b;
int sum, difference;
float product; // Declare Variables
double c,d;

ofstream outResults;
outResults.open( "Vidaurri_calcResults3.txt", ios::app); //Opening the text file
cout << " Input two numbers" << endl;
cin >> a >> b; // Input two integers
outResults << " Numbers you are selecting a = " << a << " b = " << b <<endl;   
outResults << " The Sum of integer" << a << "and integer" << b << "is" << a+b << endl;

outResults << "The Product of " << a << "and" << b << "is" << a * b << endl;
outResults << "The Difference between" << a << "and" << b << "is" << a - b << ends;

if(b==0) //Checking for dividing by 0
{

outResults << "Cannot division by 0!";
}
else{
outResults << "Quotient = " << a / b << endl;
outResults << "Remainder is " << a % b << endl;
}

if(a>b) //Checking if a is greater than, less than, or equal to b
{outResults << " a is greater than b";
}
else
{outResults << " b is greater than a";
}
if(a==b)
{
outResults << " The numbers are equal "; //Results are being outputted to the text file
}

if((a%2)==0) //Checking whether a and b are either even or odd
outResults << " integer a is even";
else
outResults << " a is odd";

if(b%2==0)
outResults << " Integer b is even";
else
outResults << " integer b is odd";

outResults.close(); //Closing the text file

cout << "Enter two decimal numbers" << endl;
cin >> c >> d; // Input two decimal numbers
cout << "Sum = " << c + d << endl; // Calculates all operations
cout << "Product = " << c * d << endl;
cout << "Difference = " << c - d << endl;
cout << "Quotient = " << c / d << endl;
cout << "Remainder is " << static_cast<int> (c) % static_cast<int> (d) << endl;
// Used static cast to change c and d to int and calculate remainder

system("pause");
return 0;
}

Explanation / Answer

Modified code is given below:

#include <iostream>
#include <fstream>
#include <iomanip>

using namespace std;
int main()
{

int a,b;
int sum, difference;
float product; // Declare Variables
double c,d;

ofstream outResults;
outResults.open( "Vidaurri_calcResults3.txt", ios::app); //Opening the text file

char wantToContinue;

do
{

   cout << " Input two numbers" << endl;
   cin >> a >> b; // Input two integers
   outResults << " Numbers you are selecting a = " << a << " b = " << b <<endl;
   outResults << " The Sum of integer" << a << "and integer" << b << "is" << a+b << endl;

   outResults << "The Product of " << a << "and" << b << "is" << a * b << endl;
   outResults << "The Difference between" << a << "and" << b << "is" << a - b << ends;

   if(b==0)       //Checking for dividing by 0
   {

       outResults << "Cannot division by 0!";
   }
   else{
       outResults << "Quotient = " << a / b << endl;
       outResults << "Remainder is " << a % b << endl;
   }

   if(a>b)           //Checking if a is greater than, less than, or equal to b
   {
       outResults << " a is greater than b";    
   }
   else
   {
       outResults << " b is greater than a";
   }
   if(a==b)
   {
       outResults << " The numbers are equal ";       //Results are being outputted to the text file
   }

   if((a%2)==0)                   //Checking whether a and b are either even or odd
       outResults << " integer a is even";
   else
       outResults << " a is odd";

   if(b%2==0)
       outResults << " Integer b is even";
   else
       outResults << " integer b is odd";

   outResults.close();       //Closing the text file

   cout << "Enter two decimal numbers" << endl;
   cin >> c >> d; // Input two decimal numbers
   cout << "Sum = " << c + d << endl; // Calculates all operations
   cout << "Product = " << c * d << endl;
   cout << "Difference = " << c - d << endl;
   cout << "Quotient = " << c / d << endl;
   cout << "Remainder is " << static_cast<int> (c) % static_cast<int> (d) << endl;
// Used static cast to change c and d to int and calculate remainder

   cout<< "Do you want to continue again (Y/N)? ";

    cin >> wantToContinue;
}
while(wantToContine == 'Y' || wantToContine == 'y' );

system("pause");
return 0;
}

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