[C language exploration tour] Part 2 Lesson 10: Exercise questions and exercises, study tours

[C language exploration tour] Part 2 Lesson 10: Exercise questions and exercises, study tours

Introduction

1. Course outline

2. Part 2 Lesson 11th: Exercise questions and exercises

3. Part 3 Lesson 1 notice: Install SDL

Course outline

Our courses are divided into four parts. Each part has exercise questions after completion and answers will be published. Three games will also be written in C language.

Basic knowledge of C Programming

• What is programming?

• To do their best, you must first sharpen your tools.

• Your first program

• World of Variables

• Computing

• Conditional expressions

• Loop statement

• Practice: The first C games

• Function

• Exercise questions

• Exercise: Perfect the first C games

C Advanced Technology

• Modular programming

• Attack pointer, C trump card

• Array

• String

• Preprocessing

• Create your own variable type

• File read/write

• Dynamic Allocation

• Practice: "hanging villain" games

• Exercise questions

• Exercise: Explain the pointer in your own language
  

Develop 2D games with C language-based SDL Library

• Install SDL

• Create a window and canvas

• Show images

• Event Processing

• Practice: "Super Mary pushes boxes" games

• Time usage

• Use SDL_ttf to edit text

• Use FMOD to control sound

• Practice: Visual Sound line

• Exercise questions

Data Structure

• Linked List

• Heap, stack, and queue

• Hash table

• Exercise questions
  

Part 2 Lesson 1: Exercise questions and exercises

These exercises help you to consolidate your knowledge. In fact, it is not difficult, especially for people with programming experience, but our tutorials are mainly for beginners.

If you don't want to answer these 15 questions, all of them are single-choice questions.

Exercise questions

1. What is a global variable?

   
   

   A. variables that can be accessed everywhere

   B. Any variable of the variable type

   C. Declare the variables in the main function

   
   

2. Which of the following methods is used when we introduce standard library header files?

   
   

   A. # include <time. h>

   B. # include "time. h"

   C. # include {time. h}

   D. # include [time. h]

   
   

3. C language compilation in the following order? (In fact, one step is omitted here: Assembly (if assembler is used, it will not be repeated ))

   
   

   A. Preprocessing-> compilation-> Link

   B. Compile-> link-> preprocessing

   C. Link-> preprocessing-> Compilation

   D. Preprocessing-> link-> Compilation

   
   

4. If I write & toto, what do I get?

   
   

   A. toto address

   B. toto Value

   C. Value of the variable to which toto points

   
   

5. What value should we use to initialize the pointer?

   
   

   A. NOTHING

   B. 1

   C. NULL

   D. MAIN

   E. 0_ADDRESS

   
   

6. The Code is as follows:

   
   

   Int number = 8;

   Int * pointer = & number;

   
   

   Suppose the number is at the memory address 5000, And the pointer is at the memory address 2500. What is the value of * pointer printed in the next program?

   
   

   A.m. 5000

   B. 2500

   C. 8

   D. Unpredictable

   
   

7. How many times does the subscript of an array start?

   
   

   A. 0

   B. 1

   C.-1

   
   

8. Which of the following code is used to create an array with 10 double variables?

   
   

   A. double * array [10];

   B. double array {10 };

   C. double array [10];

   D. double array [9];

   
   

9. Which of the following programs has an error?

   
   

   Int main (int argc, char * argv [])

   {

   Char city [100];

   Printf ("Which city do you live in? ");

   Scanf ("% s", & city );

   Printf ("You live in % s. I am very familiar with this city! ", City );

   Return 0;

   }

   
   

   A. The city in the second printf is missing &

   B. In the definition of the city array, the number * is missing before the city.

   C. Add an ampersand before the city in scanf.

10. Which preprocessing command indicates # End of if?

    
    

    A. # elif

    B. # endif

    C. # ifdef

    D. # ifndef

    
    

11. Can struct contain arrays?

    
    

    A. Yes

    B. No

    C. Yes, but only when the array is of the same type

    
    

12. Why do we usually prefer to use a function to initialize the struct?

    
    

    A. Once the struct has been modified, we do not need to re-initialize it in the program.

    B. This is faster for computers.

    C. This can turn my code into a C ++ form.

    
    

13. What should I do after opening a file?

    
    

    A. close the file

    B. test the validity of the file pointer.

    C. Clear the File Content

    D. Place the cursor at the beginning of the file.

    
    

14. What is the role of the following code?

    
    

    Malloc (sizeof (int) * 25 );
    

    
    

    A. Apply for A 25-byte int variable in the memory.

    B. Apply for an int array in the memory. The array contains 25 elements.

    C. Apply for a 25-byte float variable in the memory

    D. Apply for a float array in the memory. The array contains 25 elements.

    
    

15. What is buffer overflow?

    
    

    A. the stored string exceeds the maximum buffer capacity.

    B. There is an endless loop in the buffer zone.

    C. Memory leakage caused by the loss of a pointer to a string

Exercise answer

1. A

2. A

3. A

4. A

5. C

6. C

7. A

8. C

9. C

10. B

11. A

12. A

13. B

14. B

15. A
    

Exercise

Explanation pointer in your own language

It may be a bit nagging. This is what the audience will talk about.

Pointer is the essence of C language, and it is also the reason why C language is flexible and powerful and has a trap. If you are not familiar with the C language, you cannot grasp the essence.

Therefore, in this exercise, we asked everyone to use their own language (of course, it is Chinese. Please do not use English or other languages for me... haha) Let's explain the pointer and see how everyone understands it.

If you do not know clearly, please review our previous lesson on pointers: "the trump card of pointer and C language".

Store Your explanation in a Word document, TXT file, or PDF file and send it to your mailbox (see below ).

Don't give me a long story. It would be better to explain the basic concepts of some pointers first.

I will reply.

Even if you don't send it to me, please take a look at the pointer knowledge. You can read books such as C and pointer, C expert programming, and C language deep anatomy.

Part 3 Preview of Lesson 1:

Today's class is here. Come on together.

Next learning:Install SDL

Author: Xie enming

Email: enmingx@gmail.com

QQ: 379641629

: Frogoscar

Work: Embedded Software Engineer

Place of residence: south France

Public Account of the [programmer Alliance]: programmerleleague

Copyright Disclaimer: This article is an original article by the blogger. You must specify the source for reprinting. Otherwise, you will be held legally liable.