没有合适的资源？快使用搜索试试~ 我知道了~

文库首页后端C#《C#入门经典》（第四版）课后答案

《C#入门经典》（第四版）课后答案

4星 · 超过85%的资源需积分: 9 22 下载量 3 浏览量 2010-03-28 12:35:56 上传评论 1 收藏 640KB DOC 举报

温馨提示

试读

64页

《C#入门经典》（第四版）课后答案。英文版的。也可以直接从网站P2P.WROX.COM下载的。

资源推荐

资源详情

资源评论

Exercise Solutions

Chapter 1: Introducing C#

No exercises.

Chapter 2: Writing a C# Program

No exercises.

Chapter 3: Variables and Expressions

Exercise 1

Q. In the following code, how would you refer to the name great from code

in the namespace fabulous?

namespace fabulous

{

// code in fabulous namespace

}

namespace super

{

namespace smashing

{

// great name defined

}

super.smashing.great

Exercise 2

Q. Which of the following is not a legal variable name?

a. myVariableIsGood

b. 99Flake

c. _floor

d time2GetJiggyWidIt

e wrox.com

b. Because it starts with a number, and,

e Because it contains a full stop.

Exercise 3

Q. Is the string "supercalifragilisticexpialidocious" too big to fit in a

string variable? Why?

A. No, there is no theoretical limit to the size of a string that may be

contained in a string variable.

Exercise 4

Q. By considering operator precedence, list the steps involved in the

computation of the following expression:

resultVar += var1 * var2 + var3 % var4 / var5;

A. The * and / operators have the highest precedence here, followed by +, %,

and finally +=. The precedence in the exercise can be illustrated using

parentheses as follows:

resultVar += (((var1 * var2) + var3) % (var4 /

var5));

Exercise 5

Q. Write a console application that obtains four int values from the user and

displays their product.

static void Main(string[] args)

{

int firstNumber, secondNumber, thirdNumber, fourthNumber;

Console.WriteLine("Give me a number:");

firstNumber = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Give me another number:");

secondNumber = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Give me another number:");

thirdNumber = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Give me another number:");

fourthNumber = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("The product of {0}, {1}, {2}, and {3}

is {4}.",

firstNumber, secondNumber, thirdNumber,

fourthNumber,

firstNumber * secondNumber * thirdNumber *

fourthNumber);

}

Note that Convert.ToInt32() is used here, which isn’t covered in the

chapter.

Chapter 4: Flow Control

Exercise 1

Q. If you have two integers stored in variables var1 and var2, what Boolean

test can you perform to see if one or the other (but not both) is greater than

10?

A. (var1 > 10) ^ (var2 > 10)

Exercise 2

Q. Write an application that includes the logic from Exercise 1, obtains two

numbers from the user, and displays them, but rejects any input where both

numbers are greater than 10 and asks for two new numbers.

static void Main(string[] args)

{

bool numbersOK = false;

double var1, var2;

var1 = 0;

var2 = 0;

while (!numbersOK)

{

Console.WriteLine("Give me a

number:");

var1 =

Convert.ToDouble(Console.ReadLine());

Console.WriteLine("Give me another

number:");

var2 =

Convert.ToDouble(Console.ReadLine());

if ((var1 > 10) ^ (var2 > 10))

{

numbersOK = true;

}

else

{

if ((var1 <= 10) && (var2 <= 10))

{

numbersOK = true;

}

else

{

Console.WriteLine("Only one

number may be greater than 10.");

}

Console.WriteLine("You entered {0} and

{1}.", var1, var2);

}

This can be performed better using different logic, for example:

static void Main(string[] args)

{

bool numbersOK = false;

double var1, var2;

var1 = 0;

var2 = 0;

while (!numbersOK)

{

Console.WriteLine("Give me a

number:");

var1 =

Convert.ToDouble(Console.ReadLine());

Console.WriteLine("Give me another

number:");

var2 =

Convert.ToDouble(Console.ReadLine());

if ((var1 > 10) && (var2 > 10))

{

Console.WriteLine("Only one number

may be greater than 10.");

}

else

{

numbersOK = true;

}

Console.WriteLine("You entered {0} and

{1}.", var1, var2);

}

Exercise 3

Q. What is wrong with the following code?

int i;

for (i = 1; i <= 10; i++)

{

if ((i % 2) = 0)

continue;

Console.WriteLine(i);

}

A. The code should read:

int i;

for (i = 1; i <= 10; i++)

{

if ((i % 2) == 0)

continue;

Console.WriteLine(i);

}

Using the = assignment operator instead of the Boolean == operator is a

common mistake.

Exercise 4

Q. Modify the Mandelbrot set application to reQuest image limits from the

user and display the chosen section of the image. The current code outputs

as many characters as will fit on a single line of a console application;

剩余63页未读，继续阅读

评论收藏

内容反馈

资源评论

资源反馈

评论星级较低，若资源使用遇到问题可联系上传者，3个工作日内问题未解决可申请退款~

wjzt0410

2018-06-18

非常适合于新手

helllo000

粉丝: 0
资源: 1

上传资源快速赚钱

我的内容管理展开

我的资源快来上传第一个资源

我的收益

登录查看自己的收益

我的积分登录查看自己的积分

我的C币登录后查看C币余额

我的收藏

我的下载

下载帮助

前往需求广场，查看用户热搜

《C#入门经典》（第四版）课后答案

C# 入门经典（第四版）课后答案

C#入门经典第四版习题答案

C#入门经典（第四版）

C#入门经典(第四版）

C# 入门经典 第四版

c#入门经典（第四版）课后习题

C#入门经典（第4版）课后习题答案.doc

C#入门经典（第4版）课后习题答案

C#入门经典(第四版)(美)沃森 内格尔.源码

C#入门经典第四版

C#入门经典（第4版）源代码

谭浩强第四版答案

C#入门经典（第4版）.part1

C#入门经典（第4版）.part3

《算法导论》全套资料.part2.rar

C#入门经典(第四版).part6

C#入门经典 源代码 第四版

C#入门经典(第四版).part1

C#入门经典 第四版 英文原版

C#入门经典（第四版）源码 7

vc++ 应用源码包_1

vc++ 应用源码包_2

vc++ 应用源码包_6

vc++ 应用源码包_5

vc++ 应用源码包_3

最新资源

C# 入门经典第四版

C#入门经典(第四版)(美)沃森内格尔.源码

C#入门经典源代码第四版

C#入门经典第四版英文原版