C-Advanced Pointer

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Why do we need reference variables if we have pointers

Last updated: 01 December 2021

Pointers: A pointer is a variable that holds memory address of another variable. A pointer needs to be de referenced with * operator to access the memory location it point ...read more

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C Language

How many levels of pointers can we have in C/C++

Last updated: 18 January 2022

Prerequisite: Pointer in C and C++, Double Pointer (Pointer to Pointer) in CA pointer is used to point to a memory location of a variable. A pointer stores the address of ...read more

Pointer Arithmetics in C with Examples

Last updated: 22 August 2023

Pointer Arithmetic is the set of valid arithmetic operations that can be performed on pointers. The pointer variables store the memory address of another variable. It does...read more

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What is a Pointer to a Null pointer

Last updated: 16 June 2022

NULL pointer in C At the very high level, we can think of NULL as a null pointer which is used in C for various purposes. Some of the most common use cases for NULL areTo ...read more

C | Advanced Pointer | Question 10

Last updated: 28 June 2021

Output of following program[sourcecode language="C"]#include stdio.hint fun(int arr[]) { arr = arr+1; printf(%d , arr[0]);}int main(void) { int arr[2] = {10, 20} ...read more

C | Advanced Pointer | Question 9

Last updated: 28 June 2021

[sourcecode language="C"]#include stdio.h#include stdlib.hint main(void){ int i; int *ptr = (int *) malloc(5 * sizeof(int)); for (i=0; i5; i++) *(ptr + i) ...read more

C | Advanced Pointer | Question 8

Last updated: 28 June 2021

[tabby title="C"][sourcecode language="c"][/sourcecode][tabbyending] (A)2 3 5 6(B)2 3 4 5(C)4 5 0 0(D)none of the above Answ ...read more

C | Advanced Pointer | Question 7

Last updated: 28 June 2021

Assume that the size of int is 4.[sourcecode language="C"]#include stdio.hvoid f(char**);int main(){ char *argv[] = { ab, cd, ef, gh, ij, kl }; f(argv); return 0; ...read more

C | Advanced Pointer | Question 5

Last updated: 28 June 2021

Predict the output[sourcecode language="C"]#include string.h#include stdio.h#include stdlib.hvoid fun(char** str_ref){ str_ref++;}int main(){ char *str = (void *)mal ...read more

C | Advanced Pointer | Question 4

Last updated: 28 June 2021

[sourcecode language="C"]#include stdio.hchar *c[] = {GeksQuiz, MCQ, TEST, QUIZ};char **cp[] = {c+3, c+2, c+1, c};char ***cpp = cp;int main(){ printf(%s , **++cpp); ...read more

C | Advanced Pointer | Question 3

Last updated: 28 June 2021

[sourcecode language="C"]#include stdio.hint main(){ int a[5] = {1,2,3,4,5}; int *ptr = (int*)(a+1); printf(%d %d, *(a+1), *(ptr-1)); return 0;}[/sourcecode](A ...read more

C | Advanced Pointer | Question 2

Last updated: 28 June 2021

Assume sizeof an integer and a pointer is 4 byte. Output?[sourcecode language="C"]#include stdio.h#define R 10#define C 20int main(){ int (*p)[R][C]; printf(%d, size ...read more

C | Advanced Pointer | Question 1

Last updated: 28 June 2021

[tabby title="C"][sourcecode language="c"]void fun(int *p) { int q = 10; p = } int main() { int r = 20; int *p = fun(p); printf(\"%d\", *p); return 0 ...read more