Power of 2 checking

Write a program to check whether entered number i power of two or not.

#include<stdio.h>
int Check_Power_of_2(int);
int Check_Power_of_2_by_BitCount(int);
enum Num_Status{IS_POWER_OF_2,IS_NOT_POWER_OF_2};
int main()
{
	int num,status;
	printf("Enter a Number = ");
	scanf("%d",&num);
	//status = Check_Power_of_2(num);
	status = Check_Power_of_2_by_BitCount(num);
	if(status == IS_POWER_OF_2)
		printf("%d is a power of 2\n",num);
	else
		printf("%d is not a power of 2\n",num);
	return 0;
}
int Check_Power_of_2(int n)
{
	if(!(n & (n-1)))
		return IS_POWER_OF_2;
	else
		return IS_NOT_POWER_OF_2;
}
int Check_Power_of_2_by_BitCount(int n)
{
	int i,SetBitCount = 0;
	for(i=((sizeof(int)*8)-1);i>=0;i--)
	{
		if(n >> i & 1)
			SetBitCount++;
	}
	if(SetBitCount == 1)
		return IS_POWER_OF_2;
	else
		return IS_NOT_POWER_OF_2;
}

Output

Enter a Number = 64
64 is a power of 2

Enter a Number = 31
31 is not a power of 2