Go4Expert - conversion program

Hello all. I have been trying to write a program that converts degrees fahrenheit to celsius.
The way I have the program written now when you hit run it will just calculate conversions up to the max_fahrenheit = 100. I want to be able to ask the person using the program to enter the number of conversions they want to see. I have put a text block around the code that asks for input below. I need to figure out how to take that input and give the user back the number of conversions they want. Any help would be greatly appreciated.

Code:

#include<iostream>

#include<iomanip>

using namespace std;

 

int main()

{

    double celsius;

    int fahrenheit;

    const int far_value = 20;

    const int far_step = 4;

    int max_fahrenheit=100;

    int conversions;

 

    cout<<"This program is designed to convert values from fahrenheit to celsius\n"<<endl;

 

/*cout<<"Please enter the number of conversions\n"<<endl;

    cin>>conversions;

*/

 

 

    fahrenheit = far_value;

 

    cout<< setiosflags(ios::showpoint)

        << setprecision(2);

 

    cout<< "\n Degrees       Degrees\n"

        << "Fahrenheit     Celsius\n\n";   

 

    while (fahrenheit <= max_fahrenheit)

     { 

 

 

          celsius =  (fahrenheit - 32.0) / (9.0/5.0);

 

          cout<< setw(5) << fahrenheit << fixed

              << setw(15)<< celsius << endl;

 

 

          fahrenheit = (fahrenheit + far_step);

 

 

     }

 

      system("pause");

      return 0;

}