C 코드 : 입력된 값이 2의 거듭 제곱인지 확인하는 방법

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#include <stdio.h>
int main(int argc, char **argv)
{
  int rtv;
  printf("%d\n",is_power_of_two(atoi(argv[1])));
}
int is_power_of_two(unsigned n)
{
  return ( (n > 0) && !(n & (n - 1)) );
}
 
 
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