Typical Example : Post-Increment and Pre-Increment Expression in Same Statement

Postfix and Prefix Expression in Same Statement

#include<stdio.h>
#include<conio.h>
void main()
{
int i=0,j=0;
j = i++ + ++i;
printf("%d\n",i);
}

Output :

2

Explain ?

j = i++ + ++i;

1. Above Statement Contain in all 4 Operators , [ = , Post Increment , Pre Increment , + ]
2. According to Precedence there Order is -

Operator	Precedense Rank
Pre Increment	1
Post Increment	2
+	3
=	4

3. It is very interesting to know that , Which one gets executed first Pre-Increment , Post-Increment ? Refer Operator Associativity  Unary Operator's associativity is from [ R->L] so PreIncrement Operation gets executed first
4. Here Pre Increment Operation uses new Value o 'i' so [ i = 1 ].
5. This 'i = 1' is used for Post Increment Operation which uses Old Value i.e [i = 1] .
6. Both '1's are added and value 2 is assigned to 'j'.
   

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Tags / Keywords : | Post-Decrement, Post-Increment, Pre-Increment

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