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  1. //Cameron Pham             CS1A                       Chapter 4, P. 224, #20
  2. //
  3. /*******************************************************************************
  4. * 
  5. * Calculate Freezing and Boiling Points
  6. * 
  7. *______________________________________________________________________________
  8. * This program accepts a value for temperature and then determines which 
  9. * substances would freeze at a given temperature and which would boil at
  10. * a given temperature.
  11. * 
  12. * INPUT
  13. *	 Temperature in Fahrenheit
  14. * 
  15. * OUTPUT
  16. *	 List of substances that freeze at given temperature
  17. *	 List of substances that boil at given temperature
  18. * 
  19. ******************************************************************************/
  20.  #include <iostream>
  21.  using namespace std;
  22.  int main()
  23.  {
  24.  	double temperature;		//INPUT - Temperature entered by the user
  25.  
  26.  	// Freezing and boiling points for each substance
  27.  	const double ETHYL_FREEZE   = -173.0;
  28.  	const double ETHYL_BOIL     = 172.0;
  29.  	const double MERCURY_FREEZE = -38.0;
  30.  	const double MERCURY_BOIL    = 676.0;
  31.  	const double OXYGEN_FREEZE  = -362.0;
  32.  	const double OXYGEN_BOIL    = -306.0;
  33.  	const double WATER_FREEZE   = 32.0;
  34.  	const double WATER_BOIL     = 212.0;
  35.  
  36.  	// Get input from user
  37.  	cout << "Enter a temperature (in Fahrenheit): ";
  38.  	cin >> temperature;
  39.  	cout << endl;
  40.  	cout << "You entered " << temperature << "." << endl;
  41.  
  42.  	// Check which substances freeze at this temperature
  43.  	cout << "\nAt " << temperature << " degrees, the following will freeze:";
  44.  	cout << endl;
  45.  	if (temperature <= ETHYL_FREEZE)
  46.  		cout << "Ethyl alcohol" << endl;
  47.  	if (temperature <= MERCURY_FREEZE)
  48.  		cout << "Mercury" << endl;
  49.  	if (temperature <= OXYGEN_FREEZE)
  50.  		cout << "Oxygen" << endl;
  51.  	if (temperature <= WATER_FREEZE)
  52.  		cout << "Water" << endl;
  53.  
  54.  	// Check which substances boil at this temperature
  55.  	cout << "\nAt " << temperature << " degrees, the following will boil:";
  56.  	cout << endl;
  57.  	if (temperature >= ETHYL_BOIL)
  58.  		cout << "Ethyl alcohol" << endl;
  59.  	if (temperature >= MERCURY_BOIL)
  60.  		cout << "Mecury" << endl;
  61.  	if (temperature >= OXYGEN_BOIL)
  62.  		cout << "Oxygen" << endl;
  63.  	if (temperature >= WATER_BOIL)
  64.  		cout << "Water" << endl;
  65.  
  66.  	return 0;
  67.  }
Success #stdin #stdout 0s 5316KB
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stdin
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-20
stdout
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Enter a temperature (in Fahrenheit): 
You entered -20.

At -20 degrees, the following will freeze:
Water

At -20 degrees, the following will boil:
Oxygen
https://ideone.com/WhpndG
Chapter 4, p. 224, #20
language:
C++ (gcc 8.3)
created:
9 days ago
visibility:
public

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