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...compare two structures in C without comparing...

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Question by sprasad
Submitted on 9/10/2003
Related FAQ: comp.lang.c FAQ list Table of Contents
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How to compare two structures in C without comparing individual members


Answer by typo
Submitted on 9/29/2003
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According to the following page on the web, you can't do that.  You just have to write out a function that will compare all the structure members.

http://www.eskimo.com/~scs/C-faq/q2.8.html

 

Answer by naidu_trk
Submitted on 12/23/2003
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There is no such method to compare 2 structures with out comparing their individual fields due to their alignment rules. The size of the structure may be or may not be equal to the sume of the individual sizes of the fields.

 

Answer by MK-2004
Submitted on 3/2/2004
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How you can compare the content of two black boxes if you don't do that for their respective components. Structure is a collection of variables under the same name or a convenient way of grouping several pieces of related information together

A native method do not exist, but can be written for such need.

 

Answer by Sathish
Submitted on 5/10/2006
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It can be done by using memcmp(&a, &b, sizeof(the struct))

- Sathish

 

Answer by maddy25
Submitted on 12/15/2006
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structures can be compared only by comparing structure members,because the two structures compared may not be of same size.

 

Answer by Bholanath Pal
Submitted on 4/16/2007
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use memcmp to compare the structure object.
memcmp returns 0 if both are equal.

try it


 

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