C'de Bitwise ve Maskeleme

 
 #include<stdio.h> 
  
 unsigned int hesapla(unsigned int); 
 int main() 
 { 
     unsigned int sayi; 
     printf("sayi: "); 
     scanf("%d", &sayi); 
     printf("En degerli - En degersiz = %d", hesapla(sayi)); 
      
     return 0; 
 } 
  
 unsigned int hesapla(unsigned int sayi)  
 { 
     int kalan; 
     int enDegersiz=0, enDegerli, kat=1; 
    
     while(sayi != 0) { 
         kalan = sayi%2; 
          
         if(kalan==1) 
         { 
         	if(enDegersiz==0) 
         	{ 
         	    enDegersiz=kat; 
 		} 
         		 
         enDegerli=kat; 
 	} 
          
         sayi = sayi/2; 
         kat*=2; 
     } 
      
     return enDegerli-enDegersiz; 
 }