二进制位模式从左到右翻转后的值

#include <stdio.h>
#include <math.h>
unsigned int  reverse_bit(unsigned int value)
{
int i = 0, sum = 0;
int ret;
for (i = 0; i < 32; i++)
{
ret = value & 1;
sum = sum + (ret*pow(2, (31 - i)));
value = value >> 1;
}
return sum;
}
int main()
{
int num = 0;
printf("请输入一个数：\n");
scanf("%d", &num);
int ret=reverse_bit(num);
printf("%u", ret);
return 0;
}