2. 计算机
  3. As　mentioned　above,　C　imposes　relatively　few　built　-　in　ways　of　doing　things　on　the　program-　mer.　Some　common　tasks,　such　as　man

As　mentioned　above,　C　imposes　relatively　few　built　-　in　ways　of　doing　things　on　the　program-　mer.　Some　common　tasks,　such　as　man

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问题 As　mentioned　above,　C　imposes　relatively　few　built　-　in　ways　of　doing　things　on　the　program-　mer.　Some　common　tasks,　such　as　manipulating(66),(67),　and　doing(68)(I/O),　are　performed　by　calling　on　library　functions.　Other　tasks　which　you　might　want　to　do,　such　as　creating　or　listing　directories,　or　interacting　with　a　mouse,　or　displaying　windows　or　other(69)elements,　or　doing　color　graphics,　are　not　defined　by　the　C　language　at　all.　You　can　do　these　things　from　a　C　program,　of　course,　but　you　will　be　calling　on　services　which　are　peculiar　to　your　programming　environment(70),　processor,　and　operating　system)and　which　are　not　defined　by　the　C　standard.　Since　this　course　is　about　portable　C　programming,　it　will　also　be　steering　clear　of　facilities　not　provided　in　all　C　environments.
选项 A、input/output
B、inoptimization/optimization
C、inside/outside
D、inordinacy/ordinance
答案A
解析 input/output：输入/输出
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