Chapter 3 Summary and exercises of ASP. NET Introduction

Summary of this Chapter
This chapter briefly introduces the basic syntax of VB. NET and the basic concepts of object-oriented programming in VB. NET. Master and be familiar with VB. NET Language is ASP. NET Program, through the study of this chapter, you can. NET program structure, basic operations and expressions, control statements, arrays, subprograms, functions, and basic object programming have a clear understanding, and more training is required, to master and flexibly apply VB.. NET language.

Exercise
1. What are the structures of the VB. NET program in ASP. NET webpage?
2. What is the keyword of VB. NET? List at least five VB. NET keywords.
3. What are the two forms of VB. NET annotations? When is one row, multiple sentences, and one sentence, used in statement writing format?
4. What basic data types does VB. NET have?
5. What types of constants does VB. NET have? Lists common system symbol constants.
6. Where are the following errors in the VB. NET program segments?
......
Dim I As integer = 10
Str = Cstr (I)
......
7. Evaluate the values of the following expressions:
(1) "D" Like "[! A-Z] "(2)" CHRRY "Like" B? R *"
(3) Not 19> 8 (4) 8 <9 And-5>-10
(5)-5 <10 Or 6 <5 (6) set A to 10, B to 8, and C to 6, evaluate the value of A> = 2*3.14 * B And C <> 5
8. What are the applicable conditions for the condition statements of the two structures?
9. Write a program with reference to example 3.2 to judge whether the input positive integer is a single digit, two digits, or three or more digits.
10. What are the forms of loop control statements?
11. Change the Do while... Loop in example 3.3 to Do... Loop Until Loop format.
12. A course score of 10 students is 80, 78, 91, 62, 88, 82, 49, 96, 52, and 85 respectively. NET Program, find the highest score and lowest score, and obtain the average score, displayed on the web page.
13. How to define processes and functions?
14. Compile a program and display "good morning" according to the current time !" "Good afternoon !" Or "Good evening !", The current time is displayed.
15. What is a class? What is an object? What is the relationship between the two?
16. What is a. NET namespace?

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