Answer / binu

YOU CAN SET OR CLEAR THE THIRD BIT without changing other bits

#define BIT3 (0X01<<3)
void main()
{
int a;
//set the third bit of a
a|=BIT3;
//clear the third bit
a&=~BIT3;

Answer / ajay karanam

int main()
{
int number=0;
int bitTobeChanged=0;
int endResult=0;

printf("Enter the number\n");
scanf("%d",&number);

printf("Enter the bit to be changed\n");
scanf("%d",&bitTobeChanged);

endResult=number|(0x1<<(bitTobeChanged-1));

printf("End Result = %d\n",endResult);

return 0;
}

Answer / vasanth

hi Ajay... that is a great work.. well done.. but ur program
works only to change 0 to 1 of any bit but not 1 to 0..
anyhow good job...

Answer / om

void toggle_kth_bit_IMPROVED(int *n, int bitToBeChanged)
{
*n=*n^(1<<(bitToBeChanged-1));
}

Answer / om

int change_third_bit_only(int n, int bitToBeChanged)
{
int k1=1<<(bitToBeChanged-1) ;
//This is same as// int k1=pow(2, bitToBeChanged-1);
int k2=~k1;
if((n & k1) == 0)
//This means bitToBeChanged th bit in number n is 0
n=n | k1; // here changing it to 1
else //otherwise the bitToBeChanged th bit in number n is 1
n=n & k2; // here changing it to 0

return n;
}

Answer / vadivel t

assume int holds 4bytes...

For ex:

#include <stdio.h>
int main()
{
int i = 16;
if(i & 0x04)
{
/*3rd bit is set to 1- so reset it to 0 - other bits will
not be disturbed*/
i = i & 0xFFFFFFFFB;
printf("IN IF \n");
}
else
{
/*3rd bit is set to 0- So set it to 1 - other bits will
not be disturbed*/
i = i | 0x00000004;
}
printf("%d", i);
_getch();
return 0;
}

Answer / ravikumar

14

Answer / gokulnaathan

#include <stdio.h>
int main()
{
unsigned int data = 0x000000f0;
int bitpos = 4;
int bitvalue = 1;
unsigned int bit = data;
bit = (bit>>bitpos)&0x00000001;
int invbitvalue = 0x00000001&(~bitvalue);
printf("%x\n",bit);

if(bitvalue ==0)
{
if(bit==0)
printf("%x\n",data);
else
{
data = (data^(invbitvalue<<bitpos));
printf("%x\n",data);
}
}
else
{
if(bit==1)
printf("elseif %x\n",data);
else
{
data = (data|(bitvalue<<bitpos));
printf("else %x\n",data);
}
}

}

Answer / kishore batta

#include<stdio.h>
int main()
{
int number=0,set_bit=0,result=0;
printf("Enter the number:");
scanf("%x",&number);
printf("which bit to be set?:");
scanf("%x",&set_bit);
result=number|(0x1<<(set_bit-1));
printf("After setting the bit, the result is:%x
",result);
return 0;
}
OUTPUT:
Enter the number:1
which bit to be set?:4
After setting the bit, the result is:9

Answer / vignesh1988i

it's not possible to change the bit individually by the user
.. the user doen't have permission..... it should not be
allowed for security purposes... then the data can be easily
hacked....



thank u

What was noalias and what ever happened to it?

0 Answers  

Hai sir, I had planned to write the NIC scientific engineer exam , plz post the sample question......

0 Answers  

#include<stdio.h> main() { char s1[]="Ramco"; char s2[]="Systems"; s1=s2; printf("%s",s1); } Find the output

5 Answers   CitiGroup,

What are actual arguments?

0 Answers  

How can I convert integers to binary or hexadecimal?

2 Answers  

Print all numbers which has a certain digit in a certain position eg: number=45687 1 number=4 2 number=5 etc

4 Answers  

How do we swap or interchange any 2 numbers without using Temporary variable...Anybody can pls answer it.. Thanks in Advance

8 Answers  

write a function that accepts an integer/char array and an search item.If the search item is there in the array return position of array and value else return -1.without using other array,without sorting,not to use more than one loop?

3 Answers   Mind Tree,

Differentiate abs() function from fabs() function.

0 Answers  

You have an array of n integers, randomly ordered with value 1 to n-1.The array is such that there is only one and one value occurred twice. How will you find this number?

1 Answers  

What is malloc return c?

0 Answers  

How can I call system when parameters (filenames, etc.) Of the executed command arent known until run time?

0 Answers