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?
- 7 Answers
- 31192 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
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 |
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 |
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 |
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 |
Answer / hemanth
All,
output of above code is compiler depended i.e the order of
evalulation.
| Is This Answer Correct ? | 8 Yes | 5 No |
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 |
What is the c value paradox and how is it explained?
1)which of following operator can't be overloaded. a)== b)++ c)?! d)<=
Method Overloading exist in c ?
what will be the output of this program main() { int i=1; while (i<=10); { i++; } }
consider the following C code main() { int i=3,x; while(i>0) { x=func(i); i--; } int func(int n) { static sum=0; sum=sum+n; return(sum); } the final value of x is
what is the flow of execution in cprogram? ex:printf();,scanf();
Explain how can I convert a number to a string?
what are brk, sbrk?
write a c program to do the following: a) To find the area of a triangle. b) To convert the temperature from Fahrenheit to Celsius. c) To convert the time in hours : minutes : seconds to seconds.
WRITE A PROGRAM TO FIND A REVERSE OF TWO NO
24.what is a void pointer? 25.why arithmetic operation can’t be performed on a void pointer? 26.differentiate between const char *a; char *const a; and char const *a; 27.compare array with pointer? 28.what is a NULL pointer? 29.what does ‘segmentation violation’ mean? 30.what does ‘Bus Error’ mean? 31.Define function pointers? 32.How do you initialize function pointers? Give an example? 33.where can function pointers be used?
What is a file descriptor in c?
C 
