CSci 2101 Data Structures: Lab 1

Tasks marked with * are extra credit. Work on these tasks only if you are not pressed for time.

Problem 1

import java.io.*;

public class LabOneProbOne {
	public static void main(String[] args) throws IOException {
	        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		// The code below reads one integer n
		// prompt the user:
		System.out.print("Please enter an integer: ");
		// read a line of input:
		String line = in.readLine();
		// extract the integer from the entered data:
		int n = Integer.parseInt(line);

		// fill in your code here:	
		// print out the value of n
		
		// increment n by 1
		
		// print out the new value of n
		
		System.out.println("Done!");
	}
}

// What happens if the input is not an integer? 

• Task 1: Compile and run the program. When it asks for an integer, enter any integer number (a negative one is OK) and press Enter. The program should print Done!
• Task 2: What happens if you enter something other than an integer? Try it and write the answer in comments after the program.
• Task 3: Fill in the code according to the comments in the file.
• *Task 4*: Can you print the new and the old value of n on one line without changing the order of the statements in the program? The string Done! should still be on a separate line.

Problem 2

public class LabOneProbTwo {
	public static void main(String[] args) {
		Int x = 5.0
		double y = 2.4;
		
		y = x + 3.3;
		System.println("x = " + x + " y = " + );
	}
}

public clas LabOneProbThree {
	
	public void main(String[] args) {
		int myVariable = 55;
		myOtherVariable = myVarible + 55;
		double dVariable = myVariable * 2.3 - myOtherVariable / 3.;
		System.out.print("Here is the result: );
		System.out.println(dVariable;
	}
 

Problem 3

• r2d2
• noWay!
• 2BeOrNot2Be
• I love Java
• I-love-Java
• I_love_Java
• string
• switch
• _five_
• _5_
• anExtremelyAndAnnoyinglyLengthyVariableNameWhichIsTerriblyHardToRead