下面关于C++流的叙述中,正确的是( ) 语句序列char *y="Happy new year"; cout< x[80];cin.getline(x,80); 时,若键入 new year则x中的字符串是"Happy"
A.
cin是一个输入流对象
B.
可以用ifstream定义一个输出流对象
C.
执行
D.
执行语句序列char
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