Technical - int x[] = { 1, 4, 8, 5, 1, 4 };int *ptr, y;ptr = x + 4;y = ptr

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Technical | Question 9 of 126

int x[] = { 1, 4, 8, 5, 1, 4 };
int *ptr, y;
ptr = x + 4;
y = ptr - x;
What does y in the sample code above equal?

A. -3
B. 0
C. 4
D. 4 + sizeof( int )

Total Answers and Comments: 5

Last Update: June 09, 2008

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The correct answer is 'C' ...... As the value of ptr-x will always be in terms of "how many integer fields the two pointer differ".....

Moreover, answer can never be 'D', as it says 4 + sizeof(int), while the actual address should be 4*sizeof(int)...

Above answer was rated as good by the following members:
adeshgupta

July 24, 2005 11:18:29

Vijaya Bhaskar M

RE: int x[] = { 1, 4, 8, 5, 1, 4 };int *ptr, y;ptr = x + 4;y = ptr - x;What does y in the sample code ab...

The correct choice is D . since in the program it is dealing only with the address not with the values present at the address. so it will add the 4 to the size of interger.

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October 17, 2006 08:14:40

RE: int x[] = { 1, 4, 8, 5, 1, 4 };int *ptr,...

The correct answer is 'C' ...... As the value of ptr-x will always be in terms of how many integer fields the two pointer differ .....

Moreover answer can never be 'D' as it says 4 + sizeof(int) while the actual address should be 4*sizeof(int)...

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1 0

Overall Rating: +1

November 11, 2006 07:33:39

manoj

RE: int x[] = { 1, 4, 8, 5, 1, 4 };int *ptr,...

answer is -3

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0 2

Overall Rating: -2

November 26, 2006 22:54:40

Thanom

what is wrong with this

int x *ptr;
*ptr &x;

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0 1

Overall Rating: -1

June 09, 2008 15:22:38

anu1985

Member Since: May 2008 Contribution: 11

RE: int x[] = { 1, 4, 8, 5, 1, 4 };int *ptr, y;ptr = x + 4;y = ptr - x;What does y in the sample code above equal?A. -3B. 0C. 4D. 4 + sizeof( int )

ptr &x[5]
ptr (x+4)
y (x+4)-(x+0);
y 4

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