conditional macroinstructionconditional macros条件: condition; term; factor定义文件宏指令: define the file macro instruction; dtf macro instruction条件宏功能: conditional macros条件宏扩展: conditional macro expansion; conditional macroexpansion宏指令: macro command; macro instruction; macro order; macro program; macro-facility; macrocall; macros; marcoinstruction下载手机词典可随时随地查词查翻译