The value of ptr±n is the storage location ptr±n*sizeof(*ptr), where sizeof is an operator that yields the size in bytes of its operand. Consider following example: #include <stdio.h> void main(void) { int i=3, *x; float j=1.5, *y; char k=’C’, *z; printf(“Value of...
In the above example I have used &val[i] to get the address of ith element of the array. We can also use a pointer variable instead of using the ampersand (&) to get the address. Example – Array and Pointer Example in C #include<stdio.h>intmain(){/*Pointer variable*/int*p;/*A...
In this example, we will declare an integer variable and 1) an integer pointer, 2) a pointer to pointer that will store the address the address of first pointer (integer pointer). #include<iostream>usingnamespacestd;intmain(){inta;//normal integer variableint*ptr;//integer pointer declaratio...
An Example of Null pointer in C Any pointer that contains a valid memory address can be made as aNULL pointerby assigning0. Example Here, firstlyptris initialized by the address ofnum, so it is not a NULL pointer, after that, we are assigning0to theptr, and then it will become a NU...
In the above example : We declared two variables var1 and var2 A constant pointer ‘ptr’ was declared and made to point var1 Next, ptr is made to point var2. Finally, we try to print the value ptr is pointing to. So, in a nutshell, we assigned an address to a constant pointer...
C Constant pointer A pointer is said to be constant pointer when the address its pointing to cannot be changed. Lets take an example : char ch, c; char *ptr = &ch ptr = &c In the above example we defined two characters (‘ch’ and ‘c’) and a character pointer ‘ptr’. First...
Example #include<stdio.h> main (){ int a = 10; int *p; int **q; p = &a; q = &p; printf("a =%d",a); printf("a value through pointer = %d", *p); printf("a value through pointer to pointer = %d", **q); }
Apointer to pointeracts similarly to an ordinary pointer, except that it modifies the actual value associated with the pointer to which it points. To put it another way, the memory address held in an ordinary pointer is capable of being changed. Let’s consider a simple example: ...
#define safeFree(p) saferFree((void**)&(p)); //void freePointer(int** pointer); void saferFree(void** ptr); int main() { int* pointer = (int*)malloc(sizeof(int)); *pointer = 10; printf("pointer 的數值 = %p\n", pointer); printf("對 pointer 取值 = %d\n", *pointer); ...
Example of this Pointer in Java Next → ← Prev Like/Subscribe us for latest updates About Dinesh Thakur Dinesh Thakur holds an B.C.A, MCDBA, MCSD certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides around Computer fundamental , computer sof...