函数重载的主要作用是什么?函数重载时参数个数不同时,能否有缺省参数,为什么?调用不同

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问题:

函数重载的主要作用是什么?函数重载时参数个数不同时,能否有缺省参数,为什么?调用不同的重载函数是在编译时决定还是在运行时决定?

考点:C++语言程序设计C++语言程序设计题库
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下列反应中属于置换反应的是(  )

A.3Fe+2O2

点燃
.
Fe3O4

B.2H2O

通电
.
2H2↑+O2

C.Fe+CuSO4═FeSO4+Cu

D.NaOH+HCl═NaCl+H2O

题型:问答题 简答题

阅读理解。

    This is a song millions of Americans will hear this New Year's Eve. It is called Auld Lang Syne (《友谊地

久天长》). It is the traditional music played during the New Year's celebration. Auld Lang Syne is an old

Scottish poem. It tells about the need to remember old friends.

    The words "auld lang syne" mean "old long since". No one knows who wrote the poem first. However, a

version by Scottish poet Robert Bums was published (出版) in 1796. The words and music we know today

first appeared in a songbook three years later.

    The song is played in the United States mainly on New Year's Eve. The version (译文) you are hearing

today is by the Washington Saxophone Quartet. As we end our program with Auld Lang Syne. I would like

to wish all our radio friends a very Happy New Year! This is Buddy Thomas.

1. This passage is from ______. [ ]

A. a newspaper.

B. a magazine.

C. a TV program.

D. a radio program.

2. ______ is introducing Auld Lang Syne to us. [ ]

A. Robert Bums.

B. The Washington Saxophone Quartet.

C. Buddy Thomas.

D. The passage doesn't tell us.

3. From the passage, we know that The song Auld Lang Syne mainly played in the USA ______. [ ]

A. On New Year's Eve.

B. On Christmas Eve.

C. On weekends. D.On holidays.

4.The words and music of Auld Lang Syne we know today first appeared ______.[ ]

A. In 1790.

B. In 1793.

C. In 1796.

D. In 1799.

5. The song Auld Lang Syne is about ______. [ ]

A. the history of Scotland

B. an old Scottish poet

C. the need to remember old friends

D. the wishes to the radio friends

题型:问答题 简答题

37周足月儿,因母亲血清抗AIgG抗体滴度1:560而计划分娩出生。出生时一般情况好,无青紫窒息,纯母乳喂养,生后12小时即出现黄疸,其母孕期体健,前3胎中,第1胎为人工流产,第2、3胎在生后均因黄疸死亡。

最可能的诊断是()

A.新生儿败血症

B.新生儿肝炎

C.新生儿溶血症

D.胆道闭锁

E.母乳性黄疸

题型:问答题 简答题

某监理单位承担了一工业项目的施工监理工作。经过招标,建设单位选择了甲、乙施工单位分别承担A、B标段工程的施工,并按照《建设工程施工合同(示范文本)》分别和甲、乙施工单位签订了施工合同。建设单位与乙施工单位在合同中约定,B标段所需的部分设备由建设单位负责采购。乙施工单位按照正常的程序将B标段的安装工程分包给丙施工单位。在施工过程中,发生了如下事件:事件1:建设单位在采购B标段的锅炉设备时,设备生产厂商提出由自己的施工队伍进行安装更能保证质量,建设单位便与设备生产厂商签订了供货和安装合同并通知了监理单位和乙施工单位。事件2:总监理工程师根据现场反馈信息及质量记录分析,对A标段某部位隐蔽工程的质量有怀疑,随即指令甲施工单位暂停施工,并要求剥离检验。甲施工单位称:该部位隐蔽工程已经专业监理工程师验收,若剥离检验,监理单位需赔偿由此造成的损失并相应延长工期。事件3:专业监理工程师对B标段进场的配电设备进行检验时,发现由建设单位采购的某设备不合格,建设单位对该设备进行了更换,从而导致丙施工单位停工。因此,丙施工单位致函监理单位,要求补偿其被迫停工所遭受的损失并延长工期。

在事件1中,建设单位将设备交由厂商安装的做法是否正确?为什么?

题型:问答题 简答题

轻度新生儿缺氧缺血性脑病的临床表现中下述哪项不符合()。

A.生后24小时内症状最明显

B.淡漠和激惹交替

C.肌张力低下

D.拥抱反射增强

E.自发性肌阵挛

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