// Use a negation to create a useful mask to unset a bit
#include <stdio.h>
 

int main(void){                  //       X           
    unsigned char x = 7;         //0000 0111
                                 //1111 1101  &
                                 //----------
                                 //0000 0101                               
    
    printf("Number is %u\n",x);
    
    //First way
    unsigned int mask1 = 0xFD;
    unsigned int result = x & mask1;
    printf("%u\n",result);        
     
       
    //Second way                 //0000 0111    
    unsigned int mask2 = 2;                                                                     
    result = x & ~mask2;
    printf("%u\n",result);    
    return 0;
}