Exercise 2

Event Loop Nesting Exercise:

Create a C++ program ex2_converth.cpp with the following code in the Visual Studio project or copy the following code into another IDE:

// Program Convert converts a temperature in Fahrenheit to
// Celsius or a temperature in Celsius to Fahrenheit
// depending on whether the user enters an F or a C.

#include <iostream>
using namespace std;

int main ()
{
	char letter;	// Place to store input letter
	int tempIn;		// Temperature to be converted
	int tempOut;	// Converted temperature

cout  <<"Input Menu"  << endl  << endl;
	cout  <<"F:  Convert from Fahrenheit to Celsius"  << endl;
	cout  <<"C:  Convert from Celsius to Fahrenheit"  << endl;

//ADD CODE:  Begin do-while loop here

cout  <<"Type a C or an F, then press return."  << endl;
	cin  >> letter;

//REPLACE CODE: use a while loop instead of an if/else to detect
   //              and correct wrong letters
   if (letter != 'C' && letter != 'c' && letter != 'F' && letter != 'f')
	{
		cout << "Wrong letter." << endl;
		return 1;
	}
	else
	{
		cout  <<"Type an integer number, then press return." << endl;
		cin  >> tempIn;

if (letter == 'C' || letter == 'c')
		{
			tempOut = (9 * tempIn / 5) + 32;
		}
		else
		{
			tempOut = 5 * (tempIn - 32) / 9;
		}
		cout  << "Temperature to convert: "  << tempIn  << endl;
		cout  << "Converted temperature:  "  << tempOut << endl;
	}

//ADD CODE: ask user "Do you want to convert another temperature (y/n).

//ADD CODE: end do-while loop here - repeat loop if user typed a 'y'

return 0;
}

Instructions

Compile and run the program. It should seem familiar - this is one possible solution to the Fahrenheit-Celsius program you saw earlier this semester.
Add a do-while loop to ask the user to enter data until they say they are done.
Follow the ADD CODE: instructions in the program. They will guide you through the following tasks:
- Start the loop right after the menu is printed.
- End the loop after the results are printed and before the final return statement.
- Before the loop ends, and after results are printed, ask the user if they want to convert another temperature, eg:
  Do you want to convert another temperature? (y/n)
- The loop should repeat while their answer is 'y'.
Add a while loop nested inside the do-while loop. It will replace the if-else that makes sure that a valid letter is entered before calculating. The while loop should repeat until a valid letter is entered.
Use your judgement to do it correctly.

When you are done:

Take a screenshot that shows at least two conversions, includes one sample bad letter, and ends the outer loop properly.
For this exercise, you will have: ex2_converth.cpp.
Complete all the exercises in this option and upload the .cpp files and screenshots to URCourses.

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