2023-04-18 22:54 门头沟学院 C++
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判断，宏定义写法
#define CHAR_IS_NUMBER(ch) ((ch) >= '0' && (ch) <= '9')
#define CHAR_IS_BLOCK_CASE(ch) ((ch) >= 'A' && (ch) <= 'Z')
#define CHAR_IS_LOWER_CASE(ch) ((ch) >= 'a' && (ch) <= 'z')
if (CHAR_IS_NUMBER(*p))
#define CHAR_IS_BLOCK_CASE(ch) ((ch) >= 'A' && (ch) <= 'Z')
#define CHAR_IS_LOWER_CASE(ch) ((ch) >= 'a' && (ch) <= 'z')
if (CHAR_IS_NUMBER(*p))
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