Reverse the bit in a integer 倒置整形数的bit

#include <iostream>

unsigned int reverseInt(int val)
{
	unsigned int res = 0;

	for(int i = 0; i < 32; i++)
	{
		res <<= 1;
		res |= (val & 1);
		val >>= 1;
	}

	return res;
};


int main()
{
	unsigned int res = reverseInt(1);

	return 0;
}