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[单选题]
下面四个选项中,均是不合法浮点数的选项是()。
A.-e30.2341e3
B.-.18123e40.0
C.160.0.12e3
D.1232e4.2.e5
查看答案
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A.-e30.2341e3
B.-.18123e40.0
C.160.0.12e3
D.1232e4.2.e5
A.+le+1 5e-9.4 03e2
B.-.60 12e-4 -8e5
C.123e 1.2e-.4 +2e-1
D.-e3 8e-4 5.e-0
A.'\" '\\' '\xf'
B.'\1011' '\' '\a'
C.'\018' '\f\' '\}'
D.'\\0' '\+101' '\x1f'
A.--0f1 -oxffff 0011
B.-0xcdf 017 12,456
C.-018 999 5e2
D.-0x48eg -068 03f
下面4个选项中,均是不合法的用户标识符的选项是()。
A.A P,_0,do
B.float,la0,_A
C.b—a,goto,int
D._123,temp,int
A.0.0 0f 8.9e '&'
B."a" 3.9E-2.5 1e1 '\'"
C.'3' 011 0xFF00 0a
D.+001 0xabcd 2e2 50
A.016 0x8f 018
B.0abc 017 0xa
C.010 -0x11 0x16
D.0a12 7ff -123
A.A.auto Enum Include
B.B.switch typedef continue
C.C.signed union scanf
D.D.if struct type
下面各选项中,均是C语言合法标识符的选项组是
A.33 we auto
C._43 3e_ else
D.ER -DF 32