Write a C++ program that inputs a temperature in Fahrenheit and outputs the temperature in Celsius.

Step 1: Write the basic algorithm

• Allocate storage
• Input data
• Perform calculations
• Output results

Step 2: Look for the things that must be input. List them under "Input data."

• Allocate storage
• Input data
  • Temperature in Farhenheit
• Perform calculations
• Output results

Step 3: Look for things that must be output. List them under "Output results."

• Allocate storage
• Input data
  • Temperature in Farhenheit
• Perform calculations
• Output results
  • Temperature in Celsius

Step 4: Create a list of the conversions from input data to output data

• Allocate storage
• Input data
  • Temperature in Farhenheit
• Perform calculations
  • Convert Farhenheit to Celsius
• Output results
  • Temperature in Celsius

Step 5: Each data listed in input and output must be allocated

• Allocate storage
  • Temperature in Fahrenheit
  • Temperature in Celsius
• Input data
  • Temperature in Farhenheit
• Perform calculations
  • Convert Farhenheit to Celsius
• Output results
  • Temperature in Celsius

Admittedly, this is a contrived easy example that probably could be written without creating an algorithm, but these easy problems only last for a chapter or two.

Step 6: Research how to perform the calculations

In my web browser, I use google.com and searched for "convert Fahrenheit to Celsius." To convert, subtract 32 from the temperature Farhenheit, divide by 9, then multiply by 5. In pseudo-code, that looks like this:

Temperature in Celsius = (Temperature in Fahrenheit - 32) / 9 * 5

Add that to the appropriate spot under perform calculations.

• Allocate storage
  • Temperature in Fahrenheit
  • Temperature in Celsius
• Input data
  • Temperature in Farhenheit
• Perform calculations
  • Convert Farhenheit to Celsius
    • Temperature in Celsius = (Temperature in Fahrenheit - 32) / 9 * 5
• Output results
  • Temperature in Celsius

Step 7: Starting at the top of the algorithm, translate it into C++

Remember, when naming variables, make sure that

1. The names must make sense to you, the programmer
2. The names follow the capitalization rules given by your instructor
3. The names are valid for C++ (no spaces in the names)

// Allocate storage

double farhenheit;

double celsius;

// Input data

cout << "Enter the temperature in Farhenheit: ";

cin >> farhenheit;

// Perform calculations

celsius = (fahrenheit - 32) / 9.0 * 5.0;

// Output results

cout << "The temperature in celsius is " << celsius << endl;

return 0;