执行以下语句strings="123456123",t="123";intk=s.find(t,1);得到的结果是()
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strings="123";charc='a';cout<
A. 语句出错
B. 188
C. 123a
D. 12310
strings="12300",t="1256";cout<<(s
A. true
B. false
C. 1
D. 0
strings,t;s="abcdefgh";t=s.substr(3);cout<
A. abc
B. cdefgh
C. defgh
D. fgh
strings,t;s="abcdefgh";t=s.substr(3,8);cout<
A. abcdefgh
B. cdefgh
C. defgh
D. 语句出错