Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...


void main()
{
int a=1;
printf("%d %d %d",a,++a,a++);
}
the output is supposed to be 1 2 2....but it is 3 3 1
this is due to calling conventions of C. if anyone can
explain me how it happens?

Answers were Sorted based on User's Feedback



void main() { int a=1; printf("%d %d %d",a,++a,a++); } the output is supposed to be 1..

Answer / sumant

In C the parameters are pushed on the stack from right to
left. So
1> it will push a=1 on the stack and do a++ making a=2
2> it will porform ++a making a = 3 and push value 3
3> it will push a on the stack which is 3

so the stack will have values 1 3 3 and it will POP in
the reverse order and thus printf will display 3 3 1

Is This Answer Correct ?    52 Yes 11 No

void main() { int a=1; printf("%d %d %d",a,++a,a++); } the output is supposed to be 1..

Answer / vishnu

first calculations will be done from right to left and then
prints accroding to the parameters passed.

Is This Answer Correct ?    29 Yes 8 No

void main() { int a=1; printf("%d %d %d",a,++a,a++); } the output is supposed to be 1..

Answer / sathish

execution does from right to left and while printing it goes from left to right.

Is This Answer Correct ?    18 Yes 3 No

void main() { int a=1; printf("%d %d %d",a,++a,a++); } the output is supposed to be 1..

Answer / pranjal kumbang

Output:3 3 1 This
is because,C's calling convention is from right to left.That
is ,firstly 1 is passed through the expression a++ and then
a is incremented to 2.Then result of ++a is passed.That is,a
is incremented to 3 and then passed.Finally,latest value of
a,i.e. 3,is passed.Thus in right to left order,1 ,3, 3 get
passed.Once printf() collects them,it prints them in the
order in which we have asked it to get them printed(and not
the order in which they were passes).thus 3 3 1 gets
printed.

Is This Answer Correct ?    8 Yes 2 No

void main() { int a=1; printf("%d %d %d",a,++a,a++); } the output is supposed to be 1..

Answer / hemanth

All,

output of above code is compiler depended i.e the order of
evalulation.

Is This Answer Correct ?    8 Yes 5 No

void main() { int a=1; printf("%d %d %d",a,++a,a++); } the output is supposed to be 1..

Answer / keerthi

while printing the output it starts from right hand
side ..so first 'a++' value is printed then '++a' value and
last it prints 'a' value

Is This Answer Correct ?    12 Yes 16 No

void main() { int a=1; printf("%d %d %d",a,++a,a++); } the output is supposed to be 1..

Answer / minchoo

answer is 2 2 1 and not 3 3 1

Is This Answer Correct ?    4 Yes 43 No

Post New Answer

More C Interview Questions

Explain a file operation in C with an example.

0 Answers   Amdocs,


to find the program of matrix multiplication using arrays

6 Answers   Bhel,


What are the advantages of using macro in c language?

0 Answers  


why do some people write if(0 == x) instead of if(x == 0)?

0 Answers  


write a program to convert a expression in polish notation(postfix) to inline(normal) something like make 723+* (2+3) x 7 (not sure) just check out its mainly printing expression in postfix form to infix.

0 Answers   Subex,


what are the advantages of a macro over a function?

0 Answers   TCS,


How can I sort a linked list?

0 Answers  


Explain how do you override a defined macro?

0 Answers  


write a program to display the array elements in reverse order in c language

16 Answers  


What is the diffences between Windows XP and Windows Visa

1 Answers   Aricent, FHF,


Define C in your own Language.

0 Answers   Motorola,


What are disadvantages of C language.

0 Answers   iNautix,


Categories