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单项选择题
A.const float PI;PI=3.14f;
B.const float PI=3.14f;
C.float const PI;PI=3.14f;
D.float const PI=3.14f;
单项选择题
A.string str="Tom\’s Living Room";
B.string str="Tom’s Living Room";
C.string str("Tom’s Living Room");
D.string str("Tom"s Living Room");