#include <stdio.h>
#define A 1
#define B 2
#define C 4
#define D 8
int main(void)
{
int flag = B|C;
switch(flag)
{
case A:
break;
case B:
break;
case C:
break;
case D:
break;
default:
}
return 0;
}
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