题目内容（请给出正确答案）

[单选题]

若要打开A盘上user子目录下名为abc．txt的文本文件进行读、写操作，下面符合此要求的函数调用是（）。

A.fopen(“A：\user\abc．txt”，“r”)

B.fopen(“A：\\user\\abc．txt”，“r+”)

C.fopen(“A：\user\abc．txt”，“rb”)

D.fopen(“A：\user\\abc．txt”，“w”)

答案

B、fopen(“A：\\user\\abc．txt”，“r+”)

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