在调用函数时，如果实参是简单变量，它与对应形参之间的数据传递方式是______。
A．地址传递
B．单向值传递
C．由实参传递给形参，再由形参传递给实参
D．传递方式由用户指定
参考答案：B
解析：[评析] C语言以定，实参变量对形参变量的数据传递是“单向值传递”，只由实参传绐形参。在内存中，实参单元与形参单元是不同的单元。调用结束后，实参单元仍保留并维持原值。
口语运用。（每小题1分，共5分） 阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话。
B: __小题1:__ My booking card number is 879623059 A: Could you tell me what movie you’d like to watch? B: My Old Classmate. A: OK. We have My Old Classmate at 1:00, 3:00 and 5:00, __小题2:__. B: I’d like the movie beginning at 3:00 A: All right. __小题3:__. B:Two. A:We have only 10 seats left now. They are in Row One and Row Four. B:Let me see. __小题4:__. What are the numbers? A:They are No. 3 Row Four and No. 5 Row Four. B:OK. That’s it. A:So, we’ll leave the two tickets for you. Please remember to take the tickets half an hour before the movie begins. B:No problem. A: ____小题5:___ See you. B:See you. |