#define BIT_SET(var,bit) ((var) |= (1

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#defineBIT_SET(var,bit)((var)|=(1#defineBIT_SET(var,bit)((var)|=(1#defineBIT_SET(var,bit)((var)|=(1这

#define BIT_SET(var,bit) ((var) |= (1
#define BIT_SET(var,bit) ((var) |= (1

#define BIT_SET(var,bit) ((var) |= (1
这个宏的意思就是将变量var的第bit位置为1