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//: GoodDocs.cpp
/*
Title: GoodDocsF.cpp
Description: Temperature Conversion Program
Date: December 8, 2013
Author: Richard S. Huntrods
Version: 1.0
Copyright: 2013 Richard S. Huntrods
*/
/*
DOCUMENTATION
Program Purpose:
Demonstrate proper format for documentation, test plans and comments.
Also demonstrate user prompts, keyboard input, simple calculations and output,
specifically converting temperatures from F to C.
Compile (assuming mingw compiler and opened command prompt): g++ -o GoodDocsF GoodDocsF.cpp
Execution (in a Command Prompt window): GoodDocsF.exe (or just GoodDocsF)
Classes: none
Variables:
input_units (char) = C or F to designate temperature units for the supplied input temperature.
output_units (char) = C or F to designate temperature units desired for the output conversion,
input_temp (float) = real (decimal) number supplied by user which is the input temperature.
output_temp (float) = calculated output temperature in output_units as a real (decimal) number.
Formulae:
The formula for converting temperatures from Fahrenheit to Celcius is:
T(C) = (T(F) - 32.0) * 5.0 / 9.0;
The formula for converting temperatures from Celcius to Fahrenheit is:
T(F) = (T(C) * 9.0 / 5.0) + 32.0
It is important to use decimal numbers especially in the division to avoid integer devision.
It is also important use use the parenthesis to enforce calculation order.
*/
/*
TEST PLAN
Normal case 1:
>What is the input temperature? 32
>What are the units of the input temperature (C for Celcius or F for Fahrenheit)? F
>Your input temperature is 32F which is 0C.
Normal case 2:
>What is the input temperature? 100
>What are the units of the input temperature (C for Celcius or F for Fahrenheit)? C
>Your input temperature is 100C which is 212F.
Bad Data case 1 (temperature out of range):
>What is the input temperature? -4000
>What are the units of the input temperature (C for Celcius or F for Fahrenheit)? C
>Your input temperature is -4000C which is out of range (less than -273.15C or -416F)..
Bad Data case 2 (incorrect units):
>What is the input temperature? -40
>What are the units of the input temperature (C for Celcius or F for Fahrenheit)? Q
>The units you have specified are not one of C (Celcius) or F (Fahrenheit).
Discussion:
The program accepts any integer or decimal input temperature and a unit character which must be either C, c, F or f.
The program then prints the input temperature as well as the temperature converted into the non-input units.
Temperature range is from -273C (-415F) to any positive number.
*/
#include <iostream> // Stream declarations
using namespace std;
int main(void) {
char input_units, output_units;
float input_temp, output_temp;
int error = 0;
// request and obtain name
cout << "What is the input temperature? ";
cin >> input_temp;
// request and obtain age
cout << "What are the units of the input temperature (C for Celcius or F for Fahrenheit)? ";
cin >> input_units;
// convert input units to upper case
input_units = toupper(input_units);
// check input_units for acceptable response; perform appropriate conversion if acceptable and print error message if not
if(input_units == 'C') {
// display input
cout << "Your input temperature is " << input_temp << input_units;
// range check input_temp
if(input_temp < -273) {
// disply out of range error message
cout << " which is out of range (less than -273C or -416F)." << endl;
}
else {
// convert from Celcius to Fahrenheit
output_units = 'F';
output_temp = (input_temp * 9.0) / (5.0 + 32.0);
// display converted output
cout << " which is " << output_temp << output_units << "." << endl;
}
}
else if(input_units == 'F') {
// display input
cout << "Your input temperature is " << input_temp << input_units;
// range check input_temp
if(input_temp < -416) {
// out of range
cout << " which is out of range (less than -273C or -416F)." << endl;
}
else {
// convert from Fahrenheit to Celcius
output_units = 'C';
output_temp = (input_temp - 32.0 * 5.0) / 9.0;
// display converted output
cout << " which is " << output_temp << output_units << "." << endl;
}
}
else {
// display input_unit error message
cout << "The units you have specified are not one of C (Celcius) or F (Fahrenheit)" << endl;
}
} ///:~
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