Assignment #69

Code

    /// Name: Mahima Choudhary
    /// Period: 6
    /// Program Name: do-while Swimming
    /// File Name: DoWhileSwimming.java
    /// Date Finished: 1/4/2015
    
    import java.util.Scanner;

    public class DoWhileSwimming
    {
    	public static void main( String[] args ) throws Exception
    	{
    		Scanner keyboard = new Scanner(System.in);
    
    		String swimmer1 = "GALLANT";
    		String swimmer2 = "GOOFUS ";
    
    		double minimumTemperature = 79.0; // degrees Fahrenheit
    		double currentTemperature;
    		double savedTemperature;
    		int swimTime;
    
    		System.out.print("What is the current water temperature? ");
    		currentTemperature = keyboard.nextDouble();
    		savedTemperature = currentTemperature; // saves a copy of this value so we can get it back later.
    
    		System.out.println( "\nOkay, so the current water temperature is " + currentTemperature + "F." );
    		System.out.println( swimmer1 + " approaches the lake...." );
    
    		swimTime = 0;
    		while ( currentTemperature >= minimumTemperature )
    		{
    			System.out.print( "\t" + swimmer1 + " swims for a bit." );
    			swimTime++;
    			System.out.println( " Swim time: " + swimTime + " min." );
    			Thread.sleep(600); // pauses for 600 milliseconds
    			currentTemperature -= 0.5; // subtracts 1/2 a degree from the water temperature
    			System.out.println( "\tThe current water temperature is now " + currentTemperature + "F." );
    		}
    
    		System.out.println( swimmer1 + " stops swimming. Total swim time: " + swimTime + " min." );
    
    		currentTemperature = savedTemperature; // restores original water temperature
    
    		System.out.println( "\nOkay, so the current water temperature is " + currentTemperature + "F." );
    		System.out.println( swimmer2 + " approaches the lake...." );
    
    		swimTime = 0;
    		do
    		{
    			System.out.print( "\t" + swimmer2 + " swims for a bit." );
    			swimTime++;
    			System.out.println( " Swim time: " + swimTime + " min." );
    			Thread.sleep(600);
    			currentTemperature -= 0.5;
    			System.out.println( "\tThe current water temperature is now " + currentTemperature + "F." );
    
    		} while ( currentTemperature >= minimumTemperature );
    
    		System.out.println( swimmer2 + " stops swimming. Total swim time: " + swimTime + " min." );
    	}
    }
    
    //Goofus and Gallant swim for the same amount of time when current temperature is 80.5
    //Only goofus swims when current temperature is 78
    //Gallant checks the water first
    //Goofus just dives into the water
    //do-while runs the loop then checks the parameters, but the while loop checks the parameters before running the code, while 
    //while is a pre-test loop; do-while is a post-test loop
    

Picture of the output