C++ requirements

All values must be read in as type double and all calculations need to be done using type double.

Failure to follow the C++ requirements could reduce the points received from passing the tests.

General overview

This program will convert a set of temperatures from Fahrenheit to Celsius.

Your program will be reading in three double values. The first values are starting and ending temperatures. The third value is the increment value. There is no prompt for the input. There is an error message that can be displayed. This is discussed later.

You need to display output for all of the values between the starting and ending values. First two values are temperatures in Fahrenheit. You need to display all of the values from the first temperature to the last temperature. You increment from one temperature to the next by the increment value (the third value you read in). You need to convert these temperatures to Celsius. You need to output the temperatures as both Fahrenheit and Celsius. The numbers should be 18 characters wide with 5 digits of precision and need to be in fixed format. Do not use tab characters (\t) to output the values.

The headings are also required (see the sample output below).

The conversion from Fahrenheit to Celsius is:

celsius = (fahrenheit - 32) / 1.8

Here is a sample run with valid input:

-30 100 20 

The output would be:

 Fahrenheit Celsius -30.00000 -34.44444 -10.00000 -23.33333 10.00000 -12.22222 30.00000 -1.11111 50.00000 10.00000 70.00000 21.11111 90.00000 32.22222 

For data validation you need to make sure the first number read in is less than or equal to the second number. The third number read in must be greater than 0. If this is not the case you need to output the following message and read in three new values:

Starting temperature must be <= ending temperature and increment must be > 0.0 

The above message is all one line of output.

You need to keep reading in values and outputting messages until the values are all valid.

Using the following input :

40 30 5 30 40 -5 30 40 5 

We get the output:

Starting temperature must be <= ending temperature and increment must be > 0.0 Starting temperature must be <= ending temperature and increment must be > 0.0 Fahrenheit Celsius 30.00000 -1.11111 35.00000 1.66667 40.00000 4.44444 

Depending on the value for the increment the ending temperature may not be reached. You need to display the temperatures where the value of the Fahrenheit temperature is less than or equal to the ending temperature.

Consider this input:

100.5 110.4 5 

The valid output will be:

 Fahrenheit Celsius 100.50000 38.05556 105.50000 40.83333 

The last Fahrenheit temperature output is 105.5. The next one would have been 110.5, but this is more than the ending temperature of 100.4. This is not an error condition. The output would be as above.

Think about what other tests cases are needed? Do we cover all possible input problems or valid types of input values?