CSC212 Lab 2 2014

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--D. Thiebaut (talk) 10:53, 9 September 2014 (EDT)


Problem 1: playing with ints and doubles


  • Write a java program that contains 3 ints and displays the sum of the 3 ints
  • Modify your program so that it creates 3 doubles and display their products


Problem 2: Strings


  • Write a java program with a function called printBox(). The function receives a string as an argument, and displays the string between 2 lines of stars. For example:


String name = "Smith College";

printBox( name );


will print something like this:
*********************************
Smith College
*********************************

Note that the length of the lines of stars is fixed.


Problem 3: Loops


  • Write a Java program that displays all the integers from -10 to +10, one per line.
  • Write a Java program that displays all the positive multiples of 3 less than 30, starting with 3.
  • Write a Java program that displays all the positive multiples of 3 less than 30, starting with 0.
  • Write a Java program that displays all the negative multiples of 5 greater than -40.
  • Write a Java program that displays all the powers of 2 less than a million, starting with 2.
  • Write a Java program that prints the first 10 positive multiples of 3 and of 5, two per line, as shown below:
 3 5
 6 10
 9 15
 ...


If statements


  • Write a Java program that prints only the multiples of 3, 5 and 7 that are less than 500. To find if a variable n is divisible by 3, for example, you can do this:


if ( n % 3 == 0 ) {
     // n is a multiple of 3
}
else {
     // n is not a multiple of 3
}



=Problem 4: