Question

C++ optional exercise.

You are going to convert temperatures in this program. You will give the user the choice of converting Fahrenheit to Celsius or Celsius to Fahrenheit. With the correct answer you will also display the number entered. The user should have the option to convert as many temperatures as they want. Use functions and a menu (also a function) and, assume they will convert at least one temperature. When finished upload and submit the zipped project.

the formulas are:

centigrade = (fahrenheit - 32) * 5/9
fahrenheit = centigrade * 9/5 + 32


Trivia: the brains behind:

Anders Celsius, Swedish physicist and astronomer, 1701 - 1744
Gabriel Fahrenheit, German physicist, 1686 - 1736, inventor of the thermometer


how did they choose the ranges?

CELSIUS:
range of 100 steps,
0 degree Centigrade = freezing point of water,
100 degree Centigrade = boiling point of water

FAHRENHEIT:
range of 180 steps,
32 degree Fahrenheit = freezing point of water,
100 degree Fahrenheit = body temperature of a person (not very accurate...),
212 degree Fahrenheit = boiling point of water

Answer 1

Hello, here is the completed code you wanted. Every important statement is explained using comments. Please check and let me know if you have any doubts. Thanks.

CODE

#include<iostream>

using namespace std;

//menu function
int menu()
{
   int choice;
   cout<<"1. Fahrenheit to Celsius"<<endl;
   cout<<"2. Celsius to Fahrenheit"<<endl;
   cout<<"3. Quit"<<endl;
   cin>>choice;
  
   return choice;
}

//Fahrenheit to Celsius function
void Fahrenheit_Celsius()
{
   //variable decleration
   float temperature_celsius,temperature_fahrenheit;
  
   //prompt for temperature in Fahrenheit
   cout<<"Enter the temperature in Fahrenheit: ";
          
   //inputs temperature in Fahrenheit
   cin>>temperature_fahrenheit;
          
   //calculating temperature in Celsius
   temperature_celsius=(temperature_fahrenheit-32)*(float(5)/float(9));
          
   //printing output
   cout<<"Temperature in Fahrenheit: "<<temperature_fahrenheit<<" Temperature in Celsius: "<<temperature_celsius<<endl;
}

//Celsius to Fahrenheit
void Celsius_Fahrenheit()
{
   //variable decleration
   float temperature_celsius,temperature_fahrenheit;
  
   //prompt for temperature in Celsius
   cout<<"Enter the temperature in celsius: ";
          
   //inputs temperature in Celsius
   cin>>temperature_celsius;
  
   //calculating temperature in Fahrenheit
   temperature_fahrenheit=(temperature_celsius*(float(9)/float(5)))+32;
  
   //printing output
   cout<<"Temperature in Celsius: "<<temperature_celsius<<" Temperature in Fahrenheit: "<<temperature_fahrenheit<<endl;
}

int main()
{
   int choice;
  
   while(true)
   {
       //calling menu function
       choice=menu();
      
       //if choice is 1
       if(choice==1)
       {
           //calling Fahrenheit to Celsius function
           Fahrenheit_Celsius();
       }
       //if choice is 2
       else if(choice==2)
       {
           //calling Celsius to Fahrenheit function
           Celsius_Fahrenheit();
       }
       //if choice is 3
       else if(choice==3)
       {
           //exiting from program
           break;
       }
       //if choice is wrong
       else
       {
           cout<<"Wrong choice! Try again...."<<endl;
       }
   }  
   return 0;
}

OUTPUT

CODE SCREEN SHOT