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Hi!   Hi!           Start main()

Try stepping through the code


  Value and type of last evaluated expression: Address of array element: Address of array elementx:  (none)

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Code

 Header...

#define OPTION1 0x01 // 1 binary 00000001 
#define OPTION2 0x02 // 2 binary 00000010 
#define OPTION3 0x04 // 4 binary 00000100 
#define OPTION4 0x08 // 8 binary 00001000 
#define OPTION5 0x10 // 16 binary 00010000 
#define OPTION6 0x20 // 32 binary 00100000 


 int main(void){
   ... 

» unsigned int flags=0;

»  flags|=OPTION3;// Set OPTION3 
»  flags|=OPTION4;// Set OPTION3 

»  flags&=~OPTION4;// Unset OPTION4 
  
»  if ((flags&OPTION3)) 
    printf("Option 3 is set\n");

»  return 0;

}
Memory

main()

128
129
130
131
flags = 0

NB: the actual memory address of each variable is the
address shown plus 4291438856 (0xFFCA2908).

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Output

Option 3 is set
                                                                                                                                                                                                                                                                       
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