1.以下正确的说法是()。
A.用户调用标准库函数前,必须重新定义
B.用户可以重新定义标准库函数,若如此,该函数将失去原有含义
C.系统不允许用户重新定义标准库函数
D.用户调用标准库函数前,不必使用预编译命令将该函数所在文件包括到用户源文件中答案:B
2.do语句能够改写为()语句。
A.复合
B.if
C.switch
D.while
答案:D
3.循环语句“for(inti=0;i<n;i++cout<<i*i<<’’;”中循环体执行的次数为()。
A.1
B.n-1
C.n
D.n+1
答案:C
4.在下面循环语句中循环体执行的次数为()。for(inti=0;i<n;i++if(i>n/2break;
A.n/2
B.n/2+1
C.n/2-1
D.n-1
答案:B
5.下列适宜采用inline定义函数情况是()。
A.函数体含有循环语句
B.函数体含有递归语句
C.函数代码少、频繁调用
D.函数代码多、不常调用
答案:C
6.定义p并使p指向动态空间中的包含30个整数的数组所使用的定义语句为()。
A.int*p=newint[30];
B.int*p=newint(30;
C.int*p=new[30];
D.*p=newint[30];
答案:A
7.将两个字符串连接起来组成一个字符串时,选用()函数。
A.strlen(
B.strcap(
C.strcat(
D.strcmp(
答案:C
8.switch语句能够改写为()语句。
A.for
B.if
C.do
D.while
答案:B
9.关于void指针,下列说法正确的是()。
A.void指针就是不能指向任何数据的指针
B.void指针就是已定义而未初始化的指针
C.指向任何类型数据的指针可直接赋值给一个void指针
D.void指针值可直接赋给一个非void指针
答案:C
10.循环while(inti=0i--;执行次数是()。
A.0
B.1
C.5
D.6
答案:A
11.预处理命令在程序中都是以()符号开头的。
A.*
B.#
C.&
D.@
答案:B
12.以下能正确地定义整型变量a,b和c,并为其赋初值5的语句是()。
A.inta=b=c=5;
B.inta,b,c=5;
C.a=5,b=5,c=5;
D.a=b=c=5;
答案:A
13.若有说明语句:charc='72'则变量c()。
A.包含1个字符
B.包含2个字符
C.包含3个字符
D.说明不合法,c的值不确定
答案:A
14.可用作C++语言用户标识符的一组标识符是()。
A.voiddefine+WORD
B.a3_b3_123YN
C.for-abcCase
D.2aDOsizeof
答案:B
15.以下标识符中不全是保留字的是()。
A.caseforint
B.defathenwhile
C.boolclasslong
D.gotoreturnchar
答案:B
16.下列变量名中,()是合法的。
A.Forest
B.byte-size
C.double
D.A+a
答案:A
17.函数调用func((exp1,exp2,(exp3,exp4,exp5中所含实参的个数为()个。
A.1
B.2
C.4
D.5
答案:B
18.this指针存在的目的是()。
A.保证基类私有成员在子类中可以被访问
B.保证基类保护成员在子类中可以被访问
C.保证每个对象拥有自己的数据成员,但共享处理这些数据成员的代码
D.保证基类公有成员在子类中可以被访问
答案:C
19.定义类的动态对象数组时,系统只能够自动调用该类的()对其进行初始化。
A.友员
B.析构函数
C.无参构造函数
D.类成员
答案:C
20.对两个数组a和b进行如下初始化:chara[]="ABCDEF";charb[]={‘A’,‘B’,‘C’,‘D’
A.a和b数组完全相同
B.a和b中都存放字符串
C.sizeof(a比sizeof(b大
D.sizeof(a与sizeof(b相同
答案:C
21.对长度为N的线性表进行顺序查找,在最坏情况下所需要的比较次数为()。
A.N+1
B.N
C.(N+1/2
D.N/2
答案:B
22.二维数组在内存中的存放顺序是()。
A.按行存放
B.按列存放
C.由用户自己定义
D.由编译器决定
答案:A
23.假如指针p已经指向某个整型变量x,则(*p++相当于()。
A.x++
B.p++
C.*(p++
D.&x++
答案:A
24.如有数组intnum[5]={12,13,14,15,16};则num[0]的值为()。
A.12
B.13
C.14
D.15
答案:A
25.若p1、p2都是指向整型的指针,p1已经指向变量x,要使p2也指向x,正确的是()。
A.p2=p1;
B.p2=**p1;
C.p2=&p1;
D.p2=*p1;
答案:A
26.有语句inta[10]={10,9,8,7,6,5,4,3,2,1},*p=a;则数值为2的表达式是()。
A.a[9]
B.*p[8]
C.*(a+8)
D.p+8
答案:C
27.在C++中,访问一个指针所指向的对象的成员所用的指向运算符是()。
A.*
B.<<
C.->
D.=
答案:C
28.在面向对象的程序设计中,将一组对象的共同特性抽象出来形成()。
A.对象
B.实例
C.类
D.数组
答案:C
29.在用C++进行程序设计时,最好用()代替malloc。
A.new
B.
C.指针
D.循环
答案:A
30.不同对象可以调用相同名称的函数,但执行完全不同行为的现象称为()。
A.继承
B.访问控制
C.派生
D.多态性
答案:D
31.若定义了函数double*function(,则函数function的返回值为()。
A.实数型
B.实数的地址
C.指向函数的指针
D.函数的地址
答案:B
32.所谓数据封装就是将一组数据和与这组数据有关操作组装在一起,形成一个实体,这实体也就
A.类
B.对象
Yesterday I saw the school first class, feeling very deep. This year's theme is beauty is near. Beauty, a very common words, we are literally think beauty is beautiful. So, what is the true meaning of beauty?
With the question I look up, the first lesson is to find beauty. How to find? It makes people lost in thought. When everybody zhang two monks confused, host "shenzhou" 9 astronaut liu Yang, please tell for you. Liu said, the universe is endless, much bigger than she had expected: long, on the other side of the galaxy, the star vega, mercury, Saturn... . All panoramic view. Time is the most interesting of weightlessness, everyone one by one all floating in the air, pens, book ah of what are messy, can be fun. Finally, she concludes the essence to find beauty, love sports, and more to find the beauty around, so beauty will show in front of you.
LiuLiLi mountain elementary school teachers as the second class of the bell took to the podium, she is only 20 years old this year, in this flower age, many girls are enjoying, who will suffer poor mountainous areas! Can't liu, she is out of the mountain, liu with great love for the children's happiness, she hold the children art, gymnastics and other mountainous area children can't learn knowledge. Liu planted beauty, transfer the beauty. Let the beauty of the mountains germination, results. So she right because when people called the most beautiful teacher, this is to create beautiful?
Gymnastics team player Chen yibing showed also in the field. His contribution for our country in the London Olympic Games, the host asked him why he is going to win? His answer: before the race, they are seen as a failure. But because of his companions support each other, encourage each other. Make them very first champions league. The companion's encouragement is beauty.
Yu Dan is the most let me have a feeling of the teacher's words. She hit a harmonious beauty, for example, put eggs, tea, carrot in boiling water, eggs, hardened into the fragrant tea, tea radish was soft. That means what? Hardened eggs tend to be the kind of person who are "really low on agreeableness, and most men are single minded and turnip are too weak, they couldn't get hold of degree dating, so don't be understood, so being bullied. And the tea? It combines with water, this kind of person is good at unity collective, so they are best represents the harmonious beauty.
The school first class with only an hour and a half, but let me benefit a lot.
"Treasure ink garden" this name is how to come, I asked my father and mother, but they are not too clear, so I found the Internet to treasure the edge of the ink garden. The package at temple was built in the Qing Dynasty Jiaqing years, is enshrined in the light Song Ming Chen, Bao Zheng. There is a flood in the Xijiang River, there is a black wood drifting to the village, they put it back in the river, who knows the downstream water, the wood back to the village. When this happens again and again, people find it very strange and consecrate the black wood. Jiaqing four years the court to exterminate the corrupt He Shen, the society set off anti-corruption of the wind. As a result, people naturally want to get like that to clean Bao governance officials. Put the wood carved like BaoQingTian, build package at. The package at baomo garden predecessor.
There are many baomo garden Koi, we bought a bag of feed into a koi, the door to see there are many Koi under the bridge. We stand on the side of the bridge into the water with a feed, some from our past news Koi wags its tail to swim over, see here are also other Koi feed the gathering in crowds and groups swam, their mouths, tail slapping the water, as if eager to feed them we'll plant more points, very energetic.
Go down as if you are in the ancient garden, everywhere south of the Five Ridges classical architecture, bridges, will reveal pavilions, terraces and open halls, the heritage of Chinese culture, which baomo garden there are many precious cultural relics, there are many different periods of jade collection, calligraphy and painting etc.
1、沿着这条小路走,能到张红家。(改为反问句)
2、隐藏在芦苇里的我们看见船上载着许多货物。(缩句)
3、天上的星星在闪烁。(扩句)
4、我终于做对了这道题。(改为“被”字句)
5、这是伟大的奇观。(改为反问句、感叹句)
6、同学们去参观。(扩句,两处以上)
7、李明和以前比不是变了样吗?(改为陈述句)
8、盲人的心中装着一盏明灯。(缩句)
9、奔腾的湖水从大坝的进水口直冲了下来。(缩句)
10、柔嫩的枝条随着微风轻轻地摆动。(缩句)
11、我们又把船在树下泊了片刻。(改为“被”字句)
12、你仔细看那些细小的脚。你会想起图画上蛟龙的爪子。(把两句话合并成一句话)
13、爬山虎的脚很细小。(改为比喻句)
14、爬山虎就是这样往上爬。(扩句)
15、夜晚,天上的星星闪烁。(改为拟人句)
16、森林中小鸟在鸣叫。(改为拟人句)
17、魏格纳叩开了著名科学家科彭教授的大门。(改为“把”字句、“被”字句)
1、巨人孤独的度过了漫长的严冬。(缩句)
2、巨人生活在漂亮的花园和孩子中间,感到无比的幸福。(改为反问句)3、鲜花凋谢,树叶飘落,花园又被冰雪覆盖了。(“把”字句)
4、巨人有一颗任性,冷酷的心。巨人的花园一片荒凉,冬天永驻。(把两句话合并成一句话)
5、白鹅把我下了鱼饵的一片水面,也划为自己的地盘。(改为“被”字句)6、白鹅总是高傲的,一动不动的挺着长长的脖子。(缩句)
7、说它贪玩吧,的确是呀,要不怎么会一天一夜不回家呢?(把这个句子换个说法)
8、看它那样生气勃勃,天真可爱,我喜欢还来不及,怎么会和它生气呢?(把这个句子换个说法)
9、我不敢再讨厌木鸡了。(改为反问句)
10、这样气魄雄伟的工程,在历史上是一个伟大的奇迹。(改为反问句、双重否定句、缩句)
11、长廊每一间的横廊上都有五彩的画,几千幅画没有哪一幅是相同的。(改为肯定句)
12、北京的颐和园是个美丽的大花园。(改为反问句)
13、昆明湖的两岸栽着许多数不清的垂柳。(修改病句)
14、虽然这时不是春天,但是有哪一个春天的花园能比这时的天山更美丽呢?(改为陈述句)
15、沿着这条小路走,能到张红家。(改为疑问句)
1、搭石是家乡的一道风景。(改为感叹句)
2、天气太冷了,简直叫人受不了。(改为夸张句)
3、两岸骨肉同胞用爱心架起了一座跨越海峡的生命桥。(缩句)
4、小钱被白血病折磨得脸色苍白。(改为“把”字句)
5、那血脉亲情,如同生命的火种,必将一代一代传下去。(改为反问句)6、妈妈对我说:“我和你爸爸,今晚要去参加活动,你自己准备晚饭吧。”(第三人称转述)
7、圣诞节快到了,哥哥送给保罗一辆新车作为圣诞礼物。(改为“把”字句、“被”字句)
8、进行了文明礼貌教育后,发生了很大变化。(修改病句)
9、在时,我一丝不苟的答卷和交卷。(修改病句)
10、我担心怕他忘记,再三重复地对他说:“明天一定要把那本书带来。”(修改病句)
11、他的敲门声惊醒了树上沉睡的小鸟。(缩句)
12、两个差人将贾岛带到韩愈面前。(改为“被”字句、“把”字句)
13、乌塔一听,高兴的大叫:“我是德国人,住在汉堡。”(改为第三人称转述)14、亲自来到意大利。意大利的美丽深深感动了我。(用关联词把两句话连成一句话)
15、电脑根据这些气象资料,为主人提供一个既节能又舒适的家居环境。(缩句)
16、我想念着这位没有见过面的,不知道姓名的叔叔。(缩句)
1、浪花翠绿翠绿的,绿的发光,绿的鲜亮,欢笑着,翻滚着,一层赶着一层涌向前方。(缩句)
2、恐龙世界里,有些恐龙凶猛异常,是茹毛饮血的食肉动物。(改为反问句、感叹句、双重否定句)
3、雪下得很大。(改为比喻句)
4、人们称海洋为蔚蓝色的宝库。(改为“把”字句)
5、老师提出的问题,李林答的对答如流。(修改病句)
6、那翠绿的颜色,明亮的照耀着我们的眼睛。(改为“被”字句)
7、照红了小孩子脸的是霞光。(改为“把”字句)
8、蟋蟀在平台上鸣叫。(改为拟人句)
9、蟋蟀建筑住宅有特别的工具吗?没有。(改为陈述句)
10、春天来了,小草绿了。(改为拟人句)
11、柿子挂在枝头。(改为比喻句)
12、2010年的世博会难到不是在我国上海举办吗?(改为陈述句)
13、读了这篇文章,使我又一次受到深刻的教育。(修改病句)
14、巨人看到了孩子们幸福的笑脸和欢乐的歌声。(修改病句)
15、天天听着鸟儿歌唱。(修改病句)
16、人们搭好了简易的戏台。(改为“把”字句、“被”字句)
17、花儿在晨风中摇摆。(改为拟人句)
改写句子(5)姓名
1、那颗清冷的心唤来了寒冬。(改为“把”字句、“被”字句)
2、泉口堆满了枯枝败叶。(改为“把”字句、“被”字句)
3、百灵鸟站在枝头叫。(改为拟人句)
4、我的工作对别人都是有用的,我感到很幸福。(改为反问句)
5、清澈的.泉水静静的流着。(缩句)
6、他把花园给了孩子们。(改为“被”字句)
7、即使人们怎么呼唤,猫也不肯回来。(修改病句)
8、他从容不迫的飞快的从里面跑出来。(修改病句)
9、猫在旁边,非要把老鼠等出来不可。(改为肯定句)
10、这么可爱的小生灵,谁会不喜欢呢?(改为陈述句)
11、自古以来,人们把钱塘江大潮称为天下奇观。(改为“被”字句)
12、站在山顶上仰望,山间的云像棉花在缓缓飘动。(修改病句)
13、兵马俑虽然规模宏大,但是类型众多。(修改病句)
14、登上万寿山,颐和园的景色大半全部收在眼底。(修改病句)
15、人们把散落在地上的苹果捡了起来。(改为“被”字句)
16、老师把新同学送回了家。(改为“被”字句)
17、春风把大江南北染成了一片绿色。(改为“被”字句)
18天空中飞翔着白鸽。(扩句)
C语言while、do-while、for循环课程5
课程3中,提到C语言基本语句分为:数据定义语句,数据处理语句
数据处理语句又可分为:表达式语句,函数调用语句,空语句(;,复合语句,流程控制语句。
流程控制:指程序代码执行的顺序。流程的分类:顺序、选择、循环。
C语言的循环结构通过三种语句来实现,即while、do-while、forWhile语句的一般形式while(循环条件表达式循环体语句;
功能:当循环条件表达式为真,执行循环体语句,执行完了,再判断条件表达式是否为真,为真,则再执行,直到条件表达式为假时,退出while循环。
实例1:用while语句求1~100的累加和。
#include//C语言编译预处理命令,文件包含为stdio.h
voidmain(//至少有一个用main(命名的主函数,返回值为void无值类型{
inti=1,sum=0;/*初始化循环,定义变量i和累加器sum,定义和之前,累加器清零*/
while(i<=100
{
sum+=i;//sum+=i是一个复合赋值运算符,等价于sun=sun+i;i++;
}
printf("1+2+3+...+100=%d ",sum;//输出十进制数,1加到100累加器的和}
MicrosoftVisualC++6.0运行结果
使用while循环时,一定要对循环条件表达式中出现的变量提前赋值,并在循环体内修改有关变量的值,以使循环能趋于终止。
While循环为当型循环,do-while循环也叫直到型循环。
do-while语句的一般形式为:
do
{
循环体语句}while(
循环条件表达式
实例2:用do-while编制一个求n!的程序,n的值由键盘输入。
#include
voidmain(
{inti=1,n,p=1;
printf("请从键盘输入一个数,进行连乘积: ";
scanf("%d",&n;
do
{p=p*i;
i++;
}while(i<=n;
printf("连乘积的结果为p=n!:%d ",p;
}
分析:此程序,先定义三个变量i、n、p,p从p乘1开始执行,再i进行自增1,循环体中的语句执行完毕后,判断while的循环条件表达式,当i自增1为2时,看2是否<=输入的n值,若为真,则继续返回do循环,直到i自增的值比n大,则退出循环。
do-while主要用于人机交互,do-while循环是先执行后判断,do里面的循环体至少被执行一次。区别于while是先判断循环条件表达式,后执行。
for循环也叫步长型循环
一般格式:for(表达式1;表达式2;表达式3循环体语句;
功能:先执行表达式1,再执行表达式2,如果表达式2的值为真,就执行循环体语句,最后执行表达式3.完成一次循环后,从表达式2执行,直到表达式2为假,退出循环。
实例3:参考实例1,用while求1~100的累加和,现在用for语句求1~100的累
加和。
#include
intmain(void
{
inti;intsum=0;
/*初始化循环,定义变量i
和累加器sum,定义和之前,累加器清零*/
for(i=1;i<=100;i++
{
sum=sum+i;
}
printf("sum=%d ",sum;
return0;
}
实例4:爱因斯坦的`阶梯问题:有一个长阶梯,若每步上2阶,最后剩1阶;若每步上3阶,最后剩2阶;若每步上5阶,最后剩4阶;若每步上6阶,最后剩5阶;只有每步上7阶,最后刚好一阶也不剩。请问该阶梯至少有多少阶。编写一个C程序解决该问题。
#include
main(
{intx;
for(x=7;;x+=7
if(x%3==2&&x%5==4&&x%6==5
break;
printf("Thenumberoftheladdersis:%d ",x;
}
分析:发现x一定是7的整数倍,可以依次递增地求出7的整数倍的值(7*1、7*2、7*3……),每求出一值,就用该值与2、3、5、6进行取模运算,最先得到的满足上述5个方程式的x值即为本题的答案。
用while语句,简单快速实现爱因斯坦的阶梯问题
#include
intmain(
{
inti=1;/*i为所设的阶梯数*/
while(!((i%2==1&&(i%3==2&&(i%5==4&&(i%6==5&&(i%7==0
++i;/*满足一组同余式的判别*/
The start of this year's first class show strong,unusually brilliant.China's first female astronaut liu Yang first appeared as a guest speaker,she spoke about full of poetry,vivid tells the story of the beauty of the space,the beauty of the earth,at the same time also tells the story after she returned to the earth the beauty of human nature,tender feeling and touching.
Said liu himself in the space,more was shocked by the beauty of the earth,"this generation inhabit our planet,in the boundless universe should appear so magnificent,so dazzling,she segmental arc edge is visible,covered with a layer of blue and white halo,sunlight cast in the sea deep shallow blue,vein and clear,clear long coastline.The earth is so beautiful,exquisite planet,in a dark universe,quietly coruscate gives a dreamy,blue light,like a Mosaic on the black velvet of the sapphire,it is a kind of beyond the beauty of language.It is my home,where are my dearest friends and family,at that moment,I was so far away from the earth,but it is so close to".
Liu Yang can't wait to return to the bosom of the earth in space,"after such a trip to space,saw the smallness of the earth,to better understand the earth's greatest; left earth,and realize the dependence on the planet is infinite,infinite love.I love the sunshine here,love the fresh air here,love the pure water here,love the rivers and lakes here,love the mountains,plains,love live here diverse species,love living here we human beings".
The most beautiful,brought color to our life,warm every hurt heart,healing,gives people hope,the future and courage,they are the most beautiful,is also the most lovely!
The first day of high school life, I have some thoughts and feelings。 The passage of time can always give people some special things。
In the new environment, I feel a bit excited。 Be able to recognize the new students and teachers is my greatest gains。 In the next three years, we will learn、work and progress together to make our dreams come true。 I will have new friends, and share the joy and sadness with them。 The process of learning is also a growing process。
Similarly, I will also face many difficulties。 I might have difficulties in learning and getting along with classmates , bearing some pressure in life。 However, I will get stronger and get through every step of high school three years。
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