Want to know the explaination of code

Question

1.00/5 (2 votes)

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int temp=i;

            for (int j = arr.length-1; j >=0 ; j--) {
                int r=temp%2;
                temp=temp/2;

                if (r==0){
                    set="_\t" + set;
                }else{
                    set=arr[j] + "\t" + set;
                }
            }

What I have tried:

int temp=i;

            for (int j = arr.length-1; j >=0 ; j--) {
                int r=temp%2;
                temp=temp/2;

                if (r==0){
                    set="_\t" + set;
                }else{
                    set=arr[j] + "\t" + set;
                }
            }

Posted 20-Jul-22 3:56am

Thakur Saab 2022

Updated 20-Jul-22 11:06am

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Comments

Dave Kreskowiak 20-Jul-22 10:20am

The code sample is incomplete, lacking context in which it's used.

Your best source of information on that code is going to be the person who wrote it.

2 solutions

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CPallini · Answer 1 · 2022-07-20T04:32:00

Solution 1

Appends the array item arr[k] to the string set, if the bit (len-k-1) of i is set (where len is the length of arr).

Posted 20-Jul-22 4:32am

CPallini

Patrice T · Answer 2 · 2022-07-20T11:06:00

Quote:
Want to know the explaination of code

Your code do not behave the way you expect, or you don't understand why !

There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your code is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]

jdb - The Java Debugger[^]
https://www.jetbrains.com/idea/help/debugging-your-first-java-application.html[^]

The debugger is here to only show you what your code is doing and your task is to compare with what it should do.