38 lines
875 B
C
38 lines
875 B
C
|
/*
|
||
|
|
* C Program to Check if a given Integer is Power of 2 using Bitwise Operators
|
||
|
|
*/
|
||
|
|
#include <stdio.h>
|
||
|
|
#define NUM_BITS_INT (8*sizeof(int))
|
||
|
|
|
||
|
|
int power_of_2(unsigned int);
|
||
|
|
|
||
|
|
int main()
|
||
|
|
{
|
||
|
|
unsigned int num;
|
||
|
|
printf("\nEnter Number");
|
||
|
|
scanf("%d", &num);
|
||
|
|
power_of_2(num);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Finding the power of 2 using bit wise operators
|
||
|
|
*/
|
||
|
|
int power_of_2(unsigned int x)
|
||
|
|
{
|
||
|
|
int i, count = 0, result, shift_num;
|
||
|
|
for (i = 0; i <= NUM_BITS_INT; i++)
|
||
|
|
{
|
||
|
|
shift_num = x >> i;
|
||
|
|
result = shift_num & 1;
|
||
|
|
if (res == 1)
|
||
|
|
count++;
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
*If number of bits set to 1 are odd then the number is power of 2
|
||
|
|
*If number of bits set to 0 are even then the number is not power of 2
|
||
|
|
*/
|
||
|
|
if (count % 2 == 1)
|
||
|
|
printf("YES");
|
||
|
|
else
|
||
|
|
printf("NO");
|
||
|
|
}
|