Compiler Error 

Explanation:
The expression i+++++i is parsed as i ++ ++ + i which is an 
illegal combination of operators.

the condition is like i++ + ++i 

so 5 + 6 =11

error: invalid lvalue in increment

i+++++i=i++ + ++i
remember this expression is nothing but adding two i's

now unary operators hav higher precedence than binary
=>++ executes first
so i++ =5 (since value changes after statement)
and ++i makes it i=6

as i said its jus adding to i's
now ans=i+i=6+6=12

This statement is just i=i++ + ++i;
Initially i=5
i++ increments after the statement completed For now its 
value is 5.
++i increments before its execution.so it is 6
It executes like
i=5+6; i.e. i=11

hey sulochana hav u tried it in a compiler..
cuz for me the result for that is 12.

i+++++i might give u an error but for sure (i++ + ++i)=12

This is a very interesting issue, to solve this, first you
have to note an interesting thing about pre and
postincrementation operators : 
a) postincrementation operator instantly MAKES variable an
RVALUE in expression, this is because postincrement operator
doesnt keep track of how many postincrements were made so it
is NOT cumulative (ie u can only use one postincrementation
for variable)
b) preincrementational operator first increments variable
and THEN uses it in expression so there is no need to keep
track of how many preincrementations were made thus
preincrement is cumulative.
Following lines make the point :
i++ = 1; //WRONG! i++ becomes RVALUE,you cannot assign to it
++i = 1; //OK! you first incremented and then assigned.
and thus :
i++++; //WRONG! (i++) is RVALUE so you cannot (RVALUE)++
++++i; //OK! ++(++i)
Now, since postfic ++ has the higher precedence, :
i+++++i
is treaded like :
(i++)++ + i
which will throw compiler error.
i++ + ++i
is however fine, so as 
i+ ++++i

This issue might be compiler specific, Im not sure.

Error

:) its just how the Compiler parses things..

the..maximum matching (of a token) principle... from the 
left..

1. i++ is a valid maximum match. Good, next
2. + match, next (expects a + or a identifier,for furthur 
match)
3. + (this is not a identifier, but a + will do so: 
match=++). Next the parser wants an indentifier.. else 
compiler flags an error..
4. + (not an identifier.. so.. fails)

gives error
"error C2105: '++' needs l-value"
because it parses above expression in "((i++)++)+i), so in 
2nd unary operator it searches for l-value.
If we modify above pgm into following way:-
void main()
{
	int i=5;
        printf("%d",((i++)+(++i)));
}
it will give answer 12.
because once last pre-unary increment operator is operated, 
i is incremented to 6 and 6+6 = 12.
if we put one more print for i's value, it will give i =7. 
because first post-increment operator is operated after 
first printf statement as follows.
void main()
{
	int i=5;
        printf("%d",((i++)+(++i)));
printf("%d\n",i);  // ===> i =7
}

i think it will give a compilation error..

Hi Guys.....

The answer is 

6+6 = 12

The compiler will take the expression as 
i++ + ++i
And the expression would be evaluated from Right to left ...

so answer is 12 and i=7;