nemorathwald (
nemorathwald) wrote2009-01-15 01:21 pm
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Java Homework Number One, Part One
Write an application that reads a value representing a number of seconds, then print the equivalent amount of time as a combination of hours, minutes and seconds. For example, 9999 seconds is equivalent to 2 hours, 46 minutes, and 39 seconds.
Here is my solution.
// Import the Scanner class to receive console input.
import java.util.Scanner;
// The name of this program, or "class", is "time".
public class time
{
public static void main(String[] args)
{
// Use the Scanner class to find out what the user types.
Scanner keyboard = new Scanner(System.in);
// Print a request for the user to enter the input.
System.out.println("How many seconds? Enter an integer followed by space or return.");
/**
* keyboard.nextInt() reads one integer from the keyboard.
* Then it is defined as a variable to hold their input as a total number of seconds.
* I am using long in case the user has a lot of patience to type for a long time, so that they are less likely to break it with large numbers.
*/
long totalSeconds = keyboard.nextInt();
// Dividing any number of seconds by 3600 (60 * 60) will result in hours if using one of the integer types.
// Java will drop the remainder when it is looking for an integer.
long hours = totalSeconds / 3600;
// Remaindering the total number of seconds by 3600 will result in the number of seconds that will be converted into minutes, named remainingSeconds.
long remainingSeconds = totalSeconds % 3600;
// The process repeats, on remainingSeconds. Dividing it, this time by 60, gives us the number of minutes.
long minutes = remainingSeconds / 60;
// Once again we do the remaindering step, this time by 60, to get the number of seconds that will be printed.
long seconds = remainingSeconds % 60;
// Print results by concatenating strings with the output of those operations.
System.out.println("There are " + hours + " hours, " + minutes + " minutes, and " + seconds + " seconds in " + totalSeconds + " seconds.");
}
}
Here is my solution.
// Import the Scanner class to receive console input.
import java.util.Scanner;
// The name of this program, or "class", is "time".
public class time
{
public static void main(String[] args)
{
// Use the Scanner class to find out what the user types.
Scanner keyboard = new Scanner(System.in);
// Print a request for the user to enter the input.
System.out.println("How many seconds? Enter an integer followed by space or return.");
/**
* keyboard.nextInt() reads one integer from the keyboard.
* Then it is defined as a variable to hold their input as a total number of seconds.
* I am using long in case the user has a lot of patience to type for a long time, so that they are less likely to break it with large numbers.
*/
long totalSeconds = keyboard.nextInt();
// Dividing any number of seconds by 3600 (60 * 60) will result in hours if using one of the integer types.
// Java will drop the remainder when it is looking for an integer.
long hours = totalSeconds / 3600;
// Remaindering the total number of seconds by 3600 will result in the number of seconds that will be converted into minutes, named remainingSeconds.
long remainingSeconds = totalSeconds % 3600;
// The process repeats, on remainingSeconds. Dividing it, this time by 60, gives us the number of minutes.
long minutes = remainingSeconds / 60;
// Once again we do the remaindering step, this time by 60, to get the number of seconds that will be printed.
long seconds = remainingSeconds % 60;
// Print results by concatenating strings with the output of those operations.
System.out.println("There are " + hours + " hours, " + minutes + " minutes, and " + seconds + " seconds in " + totalSeconds + " seconds.");
}
}
no subject
So if I inputed 99,999,999,999,999 or 7.777.777.777 or 5,555,555,555.555?
no subject
no subject
Style
(Anonymous) 2009-01-15 09:07 pm (UTC)(link)Of course, if your teacher wants you to comment every line, by all means do it.
Re: Style
Re: Style
Something changed -- it probably used to be just x+y -- but now the comments are out of date and likely worse than no comments at all.
Re: Style
Re: Style
"This routine is to use the index numbers (not array elements) from every entry in this array to be used as a check in routine Zeta" is a much more useful comment than: "Get index numbers".
Go you with the programming!