v!p!n
Write a program to find the size of following structure without using size of operator
struct ABC
{
int a;
float b;
char c;
};
Hai Viewer, confused?? Hmm.. calculating the size of a datatype without using sizeof() operator seems to be weird. But pointers will help you to solve this problem. First u have to initialize a null pointer on intended datatype .You know that in 'structure ' separate memory will be allocated to each element. So, on incrementing that pointer variable, the value of that pointer will be incremented by size of that structure . That is our Goal..!!!! :)
Since we have initialized pointer with 0 we simply need to print the current pointer value..!!
solution
#include<stdio.h>
struct ABC
{
int a;
float b;
char c;
};
int main()
{
struct ABC *ptr=(struct ABC *)0;
ptr++;
printf("%d",ptr);
getch();
return 1;
}
I hope this code was useful for u!!
Have a better program for ths prblm??
Feel free to comment it here..!! :):):)
struct ABC
{
int a;
float b;
char c;
};
Hai Viewer, confused?? Hmm.. calculating the size of a datatype without using sizeof() operator seems to be weird. But pointers will help you to solve this problem. First u have to initialize a null pointer on intended datatype .You know that in 'structure ' separate memory will be allocated to each element. So, on incrementing that pointer variable, the value of that pointer will be incremented by size of that structure . That is our Goal..!!!! :)
Since we have initialized pointer with 0 we simply need to print the current pointer value..!!
solution
#include<stdio.h>
struct ABC
{
int a;
float b;
char c;
};
int main()
{
struct ABC *ptr=(struct ABC *)0;
ptr++;
printf("%d",ptr);
getch();
return 1;
}
I hope this code was useful for u!!
Have a better program for ths prblm??
Feel free to comment it here..!! :):):)
Posted in:
C PROGRAMS
,
Coding puzzles
16 comments :
vipin
printf("%d",ptr);
this is correct na ?
then we get 7 as output
@Anonymous
Hai anonymous..
Line 12 will be printf("%d",ptr);
Thnx 4 ur comment..
More support and suggestions are welcomed.!! :):)
nice one
@vicky ThanQ Vicky :)
thank u. i dont who r u. but i am happy with ur answer. i saw different answers but it gives bettrt output and easy way of understanding.
Whoa.. Encouraging comment indeed!!!!!!
Thanks for your feedback buddy.. Keep visiting.. :) :) :)
Its not giving the correct size of structure.Plz check the code once.
another sol would be
struct ABC a[2];
printf("%d",(unsigned int)&a[1]-(unsigned int)&a[0]);
please explain code line by line
hi..
i got output thanks for tat.
m getting output 12 is this correct.?by default padding happens or not?
we need get 9,not 12.
Can u explain this
Struct abc *ptr = (struct abc * )0;
Well......initialize to ZERO is to make it all structure elements NULL or zero... Our aim is just "set up" a location in memory for it which was all cleared out. This is good because it's shorter than typing bar.x = 0; bar.y = 0; bar.... one after another... (and it also takes less time to execute...(right?)!) and also so that you don't have wrong uninitialized variables in your programs!
output pexplanation plzz
gd its working
(struct ABC *)0
plz explain the above line!
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