how to set Nth bit of variable by using MACRO
- 3 Answers
- 26069 Views
- HCL, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / kirankumaryakkala
#define set(val,n) val|=1<<n //do left-shift then bitwise OR
logic is val|=1<<n
means,
first shift the value 1 to ntimes and do the bitwise or with
value.
u will get the answer
| Is This Answer Correct ? | 30 Yes | 6 No |
Answer / vikram
The above code is wrong it should be n-1 instead of n.
#include<stdio.h>
#define SET(val,n) (val|=1<<(n-1))
main()
{
int n = 256;
printf("%d",SET(n,1));
}
| Is This Answer Correct ? | 13 Yes | 8 No |
Answer / sunitha
/* macro to set Nth bit */
#define SET_N_BIT(x,n) x|((~(unsigned)0)>>(8-(n-n-1))<<n);
Try out this . this is optimised version for setting a bit
work for any bit upto 8 bits if u want for 32 bits than
replace 8 with 32.
| Is This Answer Correct ? | 3 Yes | 0 No |
what is a void pointer?
we all know about the function overloading concept used in C++ and we all learnt abt that.... but that concept is already came in C in a very smaller propotion ... my question is IN WHICH CONCEPT THERE IS A USE OF FUNCTION OVERLOADING IS USED in C language?????????????
Is main() function predfined or userdefined?
What is structure in c language?
Write a program that his output 1 12 123
Write a main() program that calls this function at least 10 times. Try implementing this function in two different ways. First, use an external variable to store the count. Second, use a local variable. Which is more appropriate?
What is abstract data structure in c?
LOGIC OF Bodmas?
What is formal argument?
Given an array of characters which form a sentence of words, give an efficient algorithm to reverse the order of the words (not characters) in it?
What is the purpose of type declarations?
how can make variable not in registers
C 
