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摘要：#define DBL_DIG <integer rvalue >= 10>#define DBL_EPSILON <double rvalue <= 10^(-9)>#define DBL_MANT_DIG <integer rvalue>#define DBL_MAX <double rvalue >= 10^37>#define DBL_MAX_10_EXP <integer rvalue >= 37>#define DBL_MAX_EXP <integer rvalue>#define DB 阅读全文