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Now, modify it to do the following: Modify the while loop to utilize tolower() or toupper().  Add default values to the to_celsius() and to_fahrenheit() functions.

Now, modify it to do the following: Modify the while loop to utilize tolower() or toupper().  Add default values to the to_celsius() and to_fahrenheit() functions.

C++ for Engineers and Scientists
C++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter6: Modularity Using Functions
Section: Chapter Questions
Problem 9PP
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#include <iostream>
#include <cmath>
 
using namespace std;
 
// declare functions
void display_menu();
void convert_temp();
double to_celsius(double fahrenheit);
double to_fahrenheit(double celsius);
 
int main() {
 
cout << "Convert Temperatures\n\n";
 
    display_menu();
    char again = 'y';
    while (again == 'y') 
    {
        convert_temp();
 
        cout << "Convert another temperature? (y/n): ";
        cin >> again;
        cout << endl;
    }
    cout << "Bye!\n";
}
 
// define functions
void display_menu() 
{
    cout << "MENU\n"
        << "1. Fahrenheit to Celsius\n"
        << "2. Celsius to Fahrenheit\n\n";
}
 
void convert_temp() 
{
    int option;
    cout << "Enter a menu option: ";
    cin >> option;
 
    double f = 0.0;
    double c = 0.0;
    switch (option) 
    {
        case 1:
            cout << "Enter degrees Fahrenheit: ";
            cin >> f;
 
            c = to_celsius(f);
            c = round(c * 10) / 10;        // round to one decimal place
 
            cout << "Degrees Celsius: " << c << endl;
            break;
        case 2:
            cout << "Enter degrees Celsius: ";
            cin >> c;
 
            f = to_fahrenheit(c);
            f = round(f * 10) / 10;       // round to one decimal place  
 
            cout << "Degrees Fahrenheit: " << f << endl;
            break;
        default:
            cout << "You must enter a valid menu number.\n";
            break;
    }
}
 
double to_celsius(double fahrenheit) 
{
    double celsius = (fahrenheit - 32.0) * 5.0 / 9.0;
    return celsius;
}
 
double to_fahrenheit(double celsius) 
{
    double fahrenheit = celsius * 9.0 / 5.0 + 32.0;
    return fahrenheit;
}
 
  • Now, modify it to do the following:
    • Modify the while loop to utilize tolower() or toupper(). 
    • Add default values to the to_celsius() and to_fahrenheit() functions.
      •  
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