C Programming - Bitwise Operators - Discussion
Discussion Forum : Bitwise Operators - Find Output of Program (Q.No. 4)
4.
If an unsigned int is 2 bytes wide then, What will be the output of the program ?
#include<stdio.h>
int main()
{
unsigned int a=0xffff;
~a;
printf("%x\n", a);
return 0;
}
Discussion:
47 comments Page 5 of 5.
Malreddy said:
10 years ago
0xffff = 1111 1111 1111 1111 it is the value is assigned for a ok.
But he/she given that ~a, it doesn't mean that a=~a.
So there is no change in value of a. So a is print as ffff only.
But he/she given that ~a, it doesn't mean that a=~a.
So there is no change in value of a. So a is print as ffff only.
(1)
Ram khanna said:
10 years ago
As there is unsigned int the value is always positive hence ~ has no effect.
Hope you understood.
Hope you understood.
Lakshmi said:
8 years ago
Thanks for explaining it.
Mohammed Umar said:
8 years ago
#include<stdio.h>
int main()
{
int a=0xffffffff,b;
b=~a;
printf("%x\n", a);
return 0;
}
I have taken this value then also it prints the same. Can anyone explain properly?
int main()
{
int a=0xffffffff,b;
b=~a;
printf("%x\n", a);
return 0;
}
I have taken this value then also it prints the same. Can anyone explain properly?
Prakash said:
6 years ago
Hi, I am Prakash.
A has not stored any where so it will not affect that is okay but I will take ex: a=1; and I will increment it to a++ but I have not stored anywhere but in the next time if I print a then why will it get effect?
A has not stored any where so it will not affect that is okay but I will take ex: a=1; and I will increment it to a++ but I have not stored anywhere but in the next time if I print a then why will it get effect?
Rashmi said:
5 years ago
Here ~ has no effect because ~a is not stored back in the variable.
++ operator itself is a self incrementing operator need not be stored.
But a+1 has to be stored back in a.
Like, a = a+1.
++ operator itself is a self incrementing operator need not be stored.
But a+1 has to be stored back in a.
Like, a = a+1.
(3)
Pavan said:
5 years ago
@All.
Answer for What is the use of 0x.
It always remember ox represent an upcoming number is a constant and hexagonal number to C compiler.
Answer for What is the use of 0x.
It always remember ox represent an upcoming number is a constant and hexagonal number to C compiler.
(2)
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