如何从C中的整数中提取位？

Question

So i'm trying to extracts bits from a 32=bit binary integer using bit shifting and masking, but i'm sightly off by one.

#include <stdio.h>

int main (){

  int number = 87; //0000 000 0000 0000 0000 0000 0101 0111
  int i;
  int bit;
  int g = 0;

   for(i = 32; i > 0; i--){

   if(g%4==0 && g!=0){
     printf(" ");
   }
    g++;
    bit = (number >> i) & 1;
    printf("%d", bit);
  }

  printf("\n");
return 0;
}

Answer 1

There is logic missing in your code..

Use

for(i **= 31**; i **>=** 0; i--)

instead of

for(i **= 32**; i **>** 0; i--)

Comment if it works for you