Thread: Ideas for sloving this problem.

Okay I been practicing with some java code. I'm trying to solve a problem on the back of this chapter. I kind of I want to solve this problem with out code being given to me. But I do want to be given hints and direction on what I can do to run this application. Here is the problem.

***Problem***
Create a version of the previous project that reverses the computation. That is, read 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.)

[code = Java]

//************************************************** ****************************
// PP 2.9.java Author: Rain_Maker
//
// This application will take the input value of
// minutes and secs. It will then display the over all users times in secs.
//************************************************** ***************************



package pp2.pkg9;

import java.util.*;

public class Pp29

{


public static void main(String[] args)

{


double hours,minutes,seconds;


Scanner scan = new Scanner(System.in);


System.out.print(" How many secs did you travel? ");
seconds = scan.nextInt();

hours = (int) seconds/3600;
minutes = hours/60;
seconds = minutes%60;

System.out.println( " The amount hours : " + hours);
// System.out.println( " The amount minutes: " + minutes);
// System.out.println( " The amount secs: " + seconds);





}
}

[/code]


I have the answer for hrs, but minutes and secs are a little difficult to solve. Can some one give me a clue on what I can do to solve this problem. I have another similar problem on the next problem I want to solve. So I really want some type of self accomplishment if I can solve both problems.

 
//******************************************************************************
//  PP 2.9.java                         Author: Rain_Maker
//
//  This application will take the input value of secs.  And display the results
//  in hrs, minutes and secs. 
//*****************************************************************************
 
 
 
package pp2.pkg9;
 
import java.util.*;
 
public class Pp29 
 
{
 
 
    public static void main(String[] args) 
 
    {
 
 
        double hours,minutes,seconds;
 
 
        Scanner scan = new Scanner(System.in);
 
 
       System.out.print(" How many secs did you travel? ");
       seconds = scan.nextInt();
 
       hours =  (int) seconds/3600; //This is supposed to show hrs
       minutes =  hours/60;  //This is supposed to show minutes
       seconds = minutes%60; //This is supposed to show secs 
 
 
       //this displays hrs
       System.out.println( " The amount hours : " + hours + " hrs"); //
 
       //this display minutes
       System.out.println( " The amount mintues: " + minutes + " mins" );
 
       //this display seconds
       System.out.println( " The amount secs: " + seconds + " secs" );
 
 
    }
}

Output

run:
How many secs did you travel? 9999
The amount hours : 2.0 hrs //this is right
The amount mintues: 0.03333333333333333 mins // this is wrong, this is supposed to be 46mins
The amount secs: 0.03333333333333333 secs // this is wrong, this is supposed to be 39 secs
BUILD SUCCESSFUL (total time: 2 seconds)

The application is supposed to take input of secs and convert them into hrs, mins and secs. The example used 9999 secs but it supposed to work on all secs enter in this text application. Do you have any ideas to find mins and secs?

Well my problem is developing the logic to even solve problems like these. I mean understanding the code statements is easy, but creating the logic is another story. As a programer with experience how will you go about solving this problem? I have a feeling I'm going to use the mod operation at any point of my code statements.

--- Update ---

Norm I'm going to go back over my code and call a night. I will try to respond tomorrow if I have any problems. I'm going to rewrite my forumula again and try again. Thank you for your advice. I find myself getting fraustrated to Easily.

--- Update ---

Okay lol,

I couldn't sleep so I started doing the problem again. I understand what my formula needs to be. My question is now once I find out the answer how do I retrieve the reminder. For example 9999/3600 = 2.7775, I now have my hrs in which I will display the output as an integer. But I wanted to retrieve the reminder to that number. I'm confuse on what I should do after this part.

Also, think about "int" math. When you have a problem, take this for example

int a = 4/3

what value do you think will be returned? If you thought "1", then your right.
In the same respect what do you think the output would be of this:

int a=4%3

Yup. you got it, "1". This is because integer logic essentially does not compute decimals, which might be causing your problem. Try using this logic to help you when dividing the seconds to get hours, minutes and seconds.

Okay here is my arithmetic. My math skills has gone down these last few years but here is what I have.

3733 * 1/3600(1hr) = 1.036... = 1hr

3733 – 3600(1hr) = 133 secs


133 * 1/60(1min) = 2 mins

133 – 120 (2min) = 13 secs

Final answer 1hrs, 2 mins & 13 secs



Thanks for the replays everyone. So I done everything in code. I'm going to write my code in similar fashion but I will wait until you responses NORM.

SPARRRRTAAAAAAAAAAAA LMFAO......SORRY......... but I did it, it works for every value I put in.

 
//******************************************************************************
//  PP 2.9.java                         Author: Rain_Maker
//
//  This application will take the input value of secs. And display the results
//  in hrs, minutes and secs. 
//*****************************************************************************
 
 
 
package pp2.pkg9;
 
import java.util.*;
 
public class Pp29 
 
{
 
 
    public static void main(String[] args) 
 
    {
 
 
        double hours,minutes,seconds,a,b;
 
        Scanner scan = new Scanner(System.in);
 
 
       System.out.print(" How many secs did you travel? ");
       seconds = scan.nextDouble();
 
       hours =  seconds/3600; //This is supposed to show hrs
           a =  seconds%3600;
 
         minutes = a/60;    
         b = seconds % 60;
 
 
 
 
 
       //this displays hrs
      System.out.println( " The amount hours : " + (int) hours + " hrs"); 
 
       //this display minutes
      System.out.println( " The amount mintues: " + (int) minutes + " mins" );
 
       //this display seconds
      System.out.println( " The amount secs: " +   (int) b + " secs" );
 
 
    }
}

Thanks again Norm and billyjthorton! Now is time to do another project, this is addictive. lol