子彈 の VISIONS

想想以下代碼的執(zhí)行結(jié)果是什么?

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#define VERSION??? 1234
#define MK_STR(x)? (#x)

void print_version() {
??? printf( MK_STR( VERSION ));
}
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"1234" 嗎？——錯(cuò)，輸出是："VERSION"?。?br />
ANSWER
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#define NUMBER B85800??? // this can be defined in the command line

#define VAL(str) #str
#define TOSTRING(str) VAL(str)

unsigned char part1[10] = TOSTRING (NUMBER); // generates "B85800"
unsigned char part2[10] = VAL(NUMBER);???????????// generates "NUMBER"
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