What is the difference between char pointer and char array Like(char *p & char p[])

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Posted 27-Jun-13 21:03pm

Prashant Gupta 241

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Richard MacCutchan 28-Jun-13 4:11am

Rather than asking questions like this, you would be better off studying a book on C++.

Prashant Gupta 241 28-Jun-13 4:49am

Ok thanks Richard actually I visit some web sites for these topic but some are contradict and not clear that's why I post my question but for next time I also prefer C++ book first.

Michał Rybiński 4-Jul-13 15:58pm

You may want revisit Bruce Eckel's Thinking in C++, chapter 3 -> pointers and arrays and chapter 8 (constants) -> Assignment and type checking -> Character array literals.

Basically both define a pointer = address to a block of memory, holding set of chars. The usage makes the difference (do you initialize them with constants in code or not and where in memory during runtime is this kept - determines what you can do in terms of pointer arithmetics and read/write accesss to particular chars)
Last link from ProgramFox solution explains it very nicely.

2 solutions

Solution 2

char *p is a pointer that point to an array, basically 4 bytes in 32 bit-operating system which hold the address of an array.
char[] p is the address of an array, basically the address of the first element in the array.

Posted 29-Jun-13 6:05am

Nguyen Hung Duong

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Thomas Daniels · Accepted Answer · 2013-06-27T21:11:00

Solution 1

Hi,

Have a look here:
http://stackoverflow.com/a/7564042[^]
http://www.cs.bu.edu/teaching/cpp/string/array-vs-ptr/[^]
http://www.artfulcode.net/articles/pointers-arrays-and-string-literals/[^]

Posted 27-Jun-13 21:11pm

Thomas Daniels

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CPallini 28-Jun-13 3:27am

Good links, my 5.

Thomas Daniels 28-Jun-13 3:29am

Thank you!

Michał Rybiński 3-Jul-13 14:11pm

You may want as well revisit Bruce Eckel's Thinking in C++, chapter 3 -> pointers and arrays and chapter 8 (constants) -> Assignment and type checking -> Character array literals.

Basically both define a pointer = address to a block of memory, holding set of chars. The usage makes the difference (do you initialize them with constants in code or not and where in memory during runtime is this kept - determines what you can do in terms of pointer arithmetics and read/write accesss to particular chars)
Last link from ProgramFox explains it very nicely.

Thomas Daniels 4-Jul-13 12:07pm

Hi,

You posted a comment to my answer, but Prashant Gupta 241 will probably not read it. Post your comment as an answer or as a comment to the question, then Prashant Gupta 241 will get a notification.

Michał Rybiński 4-Jul-13 16:01pm

:) thx

Thomas Daniels 5-Jul-13 12:09pm

You're welcome!