If I write a program like following : # include <stdio...

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Question by Tapas Chakraborti
Submitted on 1/4/2004
Related FAQ: comp.lang.c Answers (Abridged) to Frequently Asked Questions (FAQ)
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If I write a program like following : # include <stdio.h> main() { int a = 1; printf("%d , %d" , a++ , a++); } Then why the output is 2,1 instead of 1,2 ?

Answer by bharathv
Submitted on 1/8/2004
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since printf is executed from right to left... so the right most a is incremented (ie., post) so its value will be 1, but when it comes to 1st a, the value of "a" would have already updated to 2 & it is post increment so its value will be incremented after the printf instruction.

Answer by ARYAN
Submitted on 10/19/2005
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because it follows the rule "last in first out"[LIFO].

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