What is the difference between constant pointer and pointer
to a constant. Give examples.

Answers were Sorted based on User's Feedback



What is the difference between constant pointer and pointer to a constant. Give examples...

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

Is This Answer Correct ?    32 Yes 0 No

What is the difference between constant pointer and pointer to a constant. Give examples...

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--;

Is This Answer Correct ?    23 Yes 8 No

What is the difference between constant pointer and pointer to a constant. Give examples...

Answer / abhradeep chatterjee

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

Is This Answer Correct ?    9 Yes 0 No

What is the difference between constant pointer and pointer to a constant. Give examples...

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--;

Is This Answer Correct ?    5 Yes 1 No

Post New Answer

More C Interview Questions

What is the use of typedef in c?

0 Answers  


There is a practice in coding to keep some code blocks in comment symbols than delete it when debugging. How this affect when debugging?

0 Answers  


What is queue in c?

0 Answers  


any function have arguments one or more OR not . it is compulsary a) any function compulsary have one or more arguments b) any function did not have arguments. It is not compulsary c) it is optional it is not compulsary d) none of the above

0 Answers  


What is c standard library?

0 Answers  






What’s the special use of UNIONS?

0 Answers   ADP,


1)what is the error in the following stmt where str is a char array and the stmt is supposed to traverse through the whole character string str? for(i=0;str[i];i++) a)There is no error. b)There shud be no ; after the stmt. c)The cond shud be str[i]!='\0' d)The cond shud be str[i]!=NULL e)i shud be initialized to 1

4 Answers  


Write a program that accepts a string where multiple spaces are given in between the words. Print the string ignoring the multiple spaces. Example: Input: “ We.....Are....Student “ Note: one .=1 Space Output: "We Are Student"

6 Answers   IBM,


What is build process in c?

0 Answers  


write a programming in c to find the sum of all elements in an array through function.

0 Answers  


main() { int arr[5]={23,67}; printf("%d%d%d",arr[2],arr[3],arr[4]); }

9 Answers   TCS,


What are qualifiers and modifiers c?

0 Answers  


Categories