int *int_ptr ### int_ptr is a pointer to data of type integer char *ch_ptr ### ch_ptr is a pointer to data of type character double *db_ptr ### db_ptr is a pointer to data of type double Note: The size of any pointer in C is same as the size of an unsigned integer. ...
A pointer is a variable. Like other variables, it has a data type and an identifier. However, pointers are used in a way that is fundamentally distinct from the way in which we use “normal” variables, and we have to include an asterisk to tell the compiler that a variable should ...
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Here using the NULL pointer you can avoid theundefined behaviorof your C program. Now you are thinking how; don’t worry I am explaining the way. In C/C++ programming a null pointer is guaranteed to compare unequal to a pointer to any object or function; that means(ptr1 == ptr2)isfa...
A pointer is a very powerful and sophisticated feature provided in the C language. A variable defined in a program the compiler allocates a space in the memory to store its value. The number of bytes allocated to the variable depends on its type. For ins
This is a more advanced concept where a pointer can point to a function, enabling dynamic function calls. This technique is often seen in implementing callback functions. 9. Dynamic Memory Allocation Manual memory management in C is crucial, and pointers are at its heart. ...
What is a dangling pointer in C++?C++ Programming Interview Question Answer:A dangling pointer arises when you use the address of an object afterits lifetime is over. This may occur in situations like returningaddresses of the automatic variablesfrom a function or using theaddress of the memory...
/* access_initialized_pointer.c -- Program accessing initialized pointers */#include <stdio.h>intmain(void){intsome=20;int*iptr=&some;/* iptr initialized with address of 'some' */printf("\nAddress of integer\'some\'in exp.\'int some = 20\'is %p\n""and where\'iptr\'is pointing...
CHAPTER 1: What is a pointer? One of those things beginners in C find difficult is the concept of pointers. The purpose of this tutorial is to provide an introduction to pointers and their use to these beginners. I have found that often the main reason beginners have a problem with pointe...
1:In C,void*can be used as a return value and function parameter but in C++ you must have a specific data type of pointer. For example: In C, the code is given below: #include <stdio.h> #include <stdlib.h> void*add_numbers(inta,intb){ ...