Answer / vignesh1988i

Constant pointer :
it is a pointer which points to the same memory location or
to same address and and whatever value the variable which is
pointed by the pointer holds.
for eg :
char a;
char const *p;
p=&a;
here var. a is a memory location having a address and that
variable contains some character data . but this pointer
p points to the same address ( a ) however the value in
var. a changes. finally, THE POINTER POINTED TO AN ADDRESS
IS A CONSTANT ,WHATEVER THE VALUE INSIDE THE VARIABLE MAY BE..

POINTER TO A CONSTANT :
this is a pointer which points to a constant variable
assigned to that pointer. and another pointer can also be
assigned to a same const. variable to point to.

for eg :
char Const a;
char *p,*q;
p=&a;
q=&a;



thank u

Answer / santosh

Pointer to constant: If pointer is pointing to constant
variable is caller pointer to constant. We can not change
the value of that constant.
const int constVariable = 6;
int *ptrConstVar = &constVariable;

Constant Pointer: We declare a pointer as constant. We can
change the content pointed by pointer. But we can not do any
airthmatic operation on the pointer like increment or decrement.
int localVariable =10;
const int *p = &localVariable;

we can not do p++ or p--;

Answer / abhradeep chatterjee

ya, vignesh, your answer is correct. thanx for giving such
a good answer.

Answer / prashant

the example given by Santosh for "Constant Pointer" is wrong .
Use
int * const p = &localVariable;
instead of const int *p = &localVariable;.

then we cant do p++ or p--;

WHAT WILL BE OUTPUT OF BELOW CODE . . AND PLEASE EXPLAIN HOW IT COME .. #include<stdio.h> #include<conio.h> void main() { int k=20; printf("%d%d%d%d",k,k++,++k,k); getch(); }

25 Answers  

---

How to check whether string is a palindrome, WITHOUT USING STRING FUNCTIONS?

2 Answers   Aricent, Manipal University,

---

#define MAX(x,y) (x) >(y)?(x):(y) main() { inti=10,j=5,k=0; k= MAX(i++,++j); printf("%d..%d..%d",i,j,k); }

0 Answers   Wilco,

---

What is C++

4 Answers  

---

What is meant by int main ()?

0 Answers  

---

what is the difference between c and java?

1 Answers  

---

What is a macro, and explain how do you use it?

0 Answers  

---

find the size of structure without using the size of function

1 Answers   Bosch,

---

Write a program in c to replace any vowel in a string with z?

0 Answers   IBS,

---

Explain what is the difference between text files and binary files?

0 Answers  

---

what is an array

5 Answers  

---

What do you mean by a local block?

0 Answers   InterGraph,

---