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  1.     #include <stdio.h>
  2.     #include <memory.h>
  3.  
  4.     void printb(unsigned int x);
  5.     int bitcount(unsigned x);
  6.  
  7.  
  8.  
  9.     int main(void){
  10.     	int i;
  11.     	unsigned int x = 0xFF30;
  12.  
  13.     	printb(x);
  14.     	printf("%d\n", bitcount(x));
  15.  
  16.  
  17.      	return 0;
  18.     }
  19.  
  20.     int bitcount(unsigned x){
  21.     	int b = 0;
  22.  
  23.     	while(x > 0)
  24.     		if(x &= (x-1))
  25.     			b++;
  26.     	return ++b;
  27.     }
  28.  
  29.     void printb(unsigned int x){
  30.     	int i;
  31.     	int mask = 0x1;
  32.  
  33.     	for(i = 15; i >= 0; i--){
  34.     		printf("%d", (x >> i) & mask);
  35.     		if((i % 4) == 0) putchar(' ');
  36.     	}
  37.     	putchar('\n');
  38.     }
Success #stdin #stdout 0s 2156KB
comments (?)
stdin
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Standard input is empty
stdout
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1111 1111 0011 0000 
10
https://ideone.com/Sz2m9O
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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