Discussions Q&R

how to remove or avoid the error of "exception in thread main java.lang null pointer exception"

30th Dec 2017, 3:21 AM

Khanh Dao

java

1 Vote

5 Réponses

24th Jul 2016, 5:59 PM

Mohammad Bhanpurwala

How to access the pointer to the character array?? What is the expected output ?

arrays c c++dynamic memory null pointers

0 Vote

What is a void pointer? Can you dereference a void pointer without knowing its type?

8th Nov 2019, 9:10 PM

Puneet Goel

1 Vote

Fix the error (segmentation fault)

18th Sep 2020, 11:08 AM

Pranjal Rastogi

c pointer

0 Vote

Why and when we use pointer in software making what its actually work ??

4th Dec 2019, 2:26 PM

Hima

doubt

1 Vote

I can't understand. why 2nd is giving error citing that "begin is not defined in scope?"???

6th Oct 2018, 3:59 PM

aditya sharma

c++pointer

1 Vote

I am getting null pointer while loading audit information,but audit is array

27th May 2021, 10:33 AM

saurabh

java

1 Vote

In C++, we use pointer. While, In java, we do not use pointer ; But both are "Object Oriented Programming", then why is it so?

18th May 2017, 11:00 AM

Hari k

c++java pointers

5 Votes

12 Réponses

28th Nov 2018, 2:51 PM

Bipin Tatkare

What's the difference between passing by pointer and passing by reference... And when to use which?

c++pointers reference-types

5 Votes

Why are garbage values stored in a pointer array even though i am dynamically allocating the right amount of space needed

27th Jan 2018, 11:31 AM

Silver Key

c pointers

0 Vote

10 Réponses

19th Mar 2020, 11:30 AM

Y AD Ù

Hey here the REF keyword is the same as a pointer in c++, right?

methods

1 Vote

Is it possible to cast a void pointer to the type of its content?

30th Dec 2018, 10:24 PM

Daniel

c++cast pointer void

0 Vote

Pointer to acess array .. i wanna acess to 2nd place in the array with ++ operator it doesn't work??

24th May 2020, 8:06 PM

Mustafa K.

Can you have a pointer to a structure without having an instance of that strucure?

0 Vote

8 Réponses

19th Jul 2020, 9:37 AM

Mostafa Ibrahim

c struct structure

1 Vote

What will be the output of following program with explanation is appreciated ?

24th Apr 2019, 2:19 PM

guNo

c pointer

0 Vote

Why there us a need to have multiple ownership of shared pointer pointing to one object?

22nd Dec 2019, 8:34 PM

Iraz Irfan

2 Votes

What's the difference between passing a struct pointer and declaring it inside the function itself?

19th Oct 2019, 11:50 AM

Amit chavare

data-structures

0 Vote

10th Oct 2020, 5:39 PM

Raj Priyadarshi

string array

array pointer

0 Vote

While performing a swap function ( passing by reference) do we swap the pointer or their values?

29th May 2019, 3:10 AM

김도현

pointers

2 Votes

Can we assign value to reference variable declaration ?

6th Feb 2018, 6:04 PM

Jupjyot Khosla

c++pointer reference

1 Vote

6 Réponses

25th Jun 2019, 7:02 AM

Ketan Lalcheta

What is the difference between call by pointer and call by reference in C++?

c++reference-types

2 Votes

Write a C program to sort an array using pointer and print the array after sorting.

17th Jul 2017, 4:47 AM

Md Faizul Haque

c program

-1 Vote

Why we need pointer??? Why we need to know the address through pointer???

31st Mar 2021, 12:49 PM

SOSO Rr

c pointer

0 Vote

How do we acces a member of a pointer structure which is also inside a structure?

3rd Mar 2019, 6:00 AM

Mohammad Saidul Arefin Taibin

access c ppinter structure

1 Vote

Could someone tell me what do we mean when we declare a pointer like that:

4th Mar 2020, 9:24 AM

CASOY

c++help pointers

1 Vote

8th Apr 2018, 7:40 AM

RiGeL

Why the output is 50?

c pointer sizeof

3 Votes

Why the pointer char size is 8 in here ? And why all size is equal ?

8th Jun 2020, 5:50 AM

Nikhil Maroju

1 Vote

Why This Program Give Error?

9th Feb 2019, 3:24 PM

Programmer Raja

c c++pointer

0 Vote

5 Réponses

6th May 2022, 5:03 PM

Rishi

Is pointer is available in Python? If there is, then how can it be used?

pointers python variables

0 Vote

What is the purpose of (void*) before a function call, while function return a pointer to void?

28th Feb 2017, 11:25 AM

Saharsh Pandey

c++cast pointer

2 Votes

8th Apr 2019, 11:00 AM

Alireza Abbasi

Use of pointer?

c++pointer pointers

1 Vote

multi-dimensional array vs pointers

10th Feb 2021, 6:15 PM

Yash Mayank

array pointer

0 Vote

I declare the function using parameter pointer (create array) but we run the programme to main function does work the array

23rd Jul 2020, 12:08 PM

Solus

function-arguments pointers

0 Vote

11 Réponses

16th Sep 2017, 12:46 PM

Vibeeshanan Vibee

naked function in friend of one class then this pointer function applicable for that function or not

,c++

0 Vote

8th Jun 2020, 11:18 AM

Amar Suryawanshi

char *p = "this";

c++pointer

1 Vote

what is the differene of passing an array and passing a pointer to a function?

3rd Jul 2017, 3:15 PM

Kushagra Agarwal

arrays c++functions pointers

1 Vote

22nd Jan 2017, 2:04 PM

Hassan Ahmadi

please help me

for pointer

1 Vote

why not printing address?

12th Apr 2017, 3:35 AM

Arif Rahman

c c++pointer

2 Votes

I am not getting pointer concept. Can anyone please explain it for me in easier way?

26th Feb 2022, 3:37 PM

Nitish

c pointers programming

1 Vote

what is the effect of passing of NULL pointer(0) to delete pointer ? pls ans me

22nd Jun 2019, 6:01 PM

Vijay Sapkal

1 Vote

If i increment the pointer and pass it to function why it prints address after returning to main??

8th Aug 2016, 6:06 PM

Santhosha S R

c c++function-arguments functions increment main pointers variables

0 Vote

A quick question: What benefit is there to making a pointer to a class object?

27th Dec 2018, 2:56 PM

Rohit

c++classes

1 Vote

If character values are stored as int why cant we hold character variable address in int pointer

21st Jun 2016, 1:24 PM

Andy Ponce

0 Vote

i don't understand the pointers

27th Mar 2021, 11:17 AM

MUDIT JAIN

benniger c++pointer

2 Votes

6 Réponses

3rd Jul 2017, 1:15 PM

matteo

Can anyone explain working of this code in brief and fix the code?

c declaration implicit pointer

2 Votes

c function-arguments pointer

13th Jan 2020, 1:27 PM

Preity

Explain this code.

0 Vote

Can we concatenate two character and store in another char or character array to print a string in C ?

7th Mar 2020, 12:34 PM

Harshit Nema

array pointer

0 Vote

Why is queue a pointer variable in Queue Management assignment (parts 1 and 2) (C++)

7th Sep 2018, 7:48 AM

deepanshu samdani

c++pointers

0 Vote

What does a statement like "int& p = a" mean?

30th Mar 2022, 5:59 AM

Paek Se

&int&pointer

0 Vote