how to set Nth bit of variable by using MACRO
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 |
How to convert a binary number to Hexa decimal number?? (Note:Do not convert it into binary and to Hexadecimal)
What is multidimensional arrays
a=0; while(a<5) printf("%d\n",a++); how many times does the loop occurs? a.infinite b.5 c.4 d.6
What does the error message "DGROUP exceeds 64K" mean?
why division operator not work in case of float constant?
void main() {int a[5],i,b=16; for(i=0;i<5;i++) a[i]=2*i; f(a,5,b); for(i=0;i<5;i++) printf("\n %d",a[i]); printf("\n %d",b); } f(int *x,int n,int y) { int i; for(i=0;i<n;i++) *(x+i)+=2; y=y+2; }wat r the errors in the prg.and improvise the prg to get o/p.?
What are the advantages and disadvantages of pointers?
What are the types of assignment statements?
What is the difference between far and near in c?
Write a program that takes a 5 digit number and calculates 2 power that number and prints it(should not use big integers and exponential functions)
2 Answers HCL, IBM, Satyam, Vimal, Vimukti Technologies,
what is Structural oriented language? give some example of this language.....?
How can I increase the allowable number of simultaneously open files?