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  1. //Zachary Abdollahi            CS1A					      Chapter 4, P. 224, #20
  2. //
  3. /*******************************************************************************
  4.  * 
  5.  * CALCULATE FREEZING AND BOILING POINTS
  6.  * 
  7.  *______________________________________________________________________________
  8.  * This program asks the user to enter a temperature and then reports which 
  9.  * substances would freeze at a given temperature and which would boil at
  10.  * a given temperature.
  11.  * 
  12.  * INPUT
  13.  *	 temperature : Temperature entered by the user (in Fahrenheit)
  14.  * 
  15.  * OUTPUT
  16.  *	 List of substances that freeze at that temperature
  17.  *   List of substances that boil at that 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.  
  40.  	// Check which substances freeze at this temperature
  41.  	cout << "\nAt " << temperature << " degrees, the following will freeze:" << endl;
  42.  	if (temperature <= ETHYL_FREEZE)
  43.  		cout << "Ethyl alcohol" << endl;
  44.  	if (temperature <= MERCURY_FREEZE)
  45.  		cout << "Mercury" << endl;
  46.  	if (temperature <= OXYGEN_FREEZE)
  47.  		cout << "Oxygen" << endl;
  48.  	if (temperature <= WATER_FREEZE)
  49.  		cout << "Water" << endl;
  50.  
  51.  	// Check which substances boil at this temperature
  52.  	cout << "\nAt " << temperature << " degrees, the following will boil:" << endl;
  53.  	if (temperature >= ETHYL_BOIL)
  54.  		cout << "Ethyl alcohol" << endl;
  55.  	if (temperature >= MERCURY_BOIL)
  56.  		cout << "Mecury" << endl;
  57.  	if (temperature >= OXYGEN_BOIL)
  58.  		cout << "Oxygen" << endl;
  59.  	if (temperature >= WATER_BOIL)
  60.  		cout << "Water" << endl;
  61.  
  62.  	return 0;
  63.  }
Success #stdin #stdout 0s 5316KB
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-20
stdout
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Enter a temperature (in Fahrenheit): 
At -20 degrees, the following will freeze:
Water

At -20 degrees, the following will boil:
Oxygen
https://ideone.com/IESJ7v
language:
C++ (gcc 8.3)
created:
15 hours ago
visibility:
public

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