C - what is the difference between *ptr++ and++*ptr

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what is the difference between *ptr++ and++*ptr

Total Answers and Comments: 3

Last Update: August 23, 2009 Asked by: saranyamahendran

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Submitted by: ziiz996

++*ptr	means increment the pointer before using it.
*ptr++	means increment the pointer after using it.

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

February 10, 2008 03:07:43

raj5045

Member Since: February 2008 Contribution: 2

RE: what is the difference between *ptr++ and++*ptr

*ptr++ gives the value the pointer is pointing to and then increment the pointer to point to next location.for e g

char *ptr "hello";

*ptr++ will give 'h' and then ptr points to 'e'

In case of ++*ptr the value at which the pointer ptr points to is incremented by 1.
In above case ++*ptr will give 'i' at the place of 'h'.The pointer still points to the first location that has the new value 'i' now.

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August 21, 2009 14:12:21

ziiz996

Member Since: August 2009 Contribution: 1

RE: what is the difference between *ptr++ and++*ptr