// Use xor to toggle a bit
#include <stdio.h>
 

int main(void){                             
    unsigned char x = 7;          //0000 0111
    
                                  //       X          
                                  //0000 0111   //7
    unsigned int mask = 2;        //0000 0010   //^
                                  //----------
                                  //0000 0101 
                                  
                                  //0000 0101   //5
                                  //0000 0010   // ^
                                  //----------
                                  //0000 0111
                                
    printf("Number is %u\n",x);
    unsigned int result = x ^ mask;
    printf("%u\n",result);
    result = result ^ mask;
    printf("%u\n",result);
    result = result ^ mask;
    printf("%u\n",result);
    
    return 0;
}