2014.8.14 language basics

I. Static and Dynamic

Ii. Development History of. net

C # Programming

(1) Project Structure

. Cs -- source file, program code

. Config -- configuration file

. Csproj -- project file (used to manage file items)

. Sln -- solution file (used to manage projects)

 

Main Function

Static void main (string [] ARGs)

{

 

}

Function four elements: name, input, output, and processing

Note shortcut: Ctrl + E, C cancel Note: Ctrl + e, u modify a single error: Alt + right arrow

 

(2) Basic Data Types

1. Integer type (byte, short, Int, long)

2. Float (float, double, decimal)

3. Char)

4. Logical type (Boolean) (bool)

5. String string type

6. datetime of the date type

Variable

Variable name naming rules: 1. it can only consist of letters, numbers, underscores, Chinese characters, or @; 2. it can only start with a letter, underscore, Chinese character, or @; 3. it cannot be the same as the system keyword. (If the keyword is used as the variable name, add @ before it @)

Constant: a symbolic constant; a literal constant. Definition of a symbolic constant: Add const to it. A constant can only be a value, but cannot be a value.

Const bool B = true; the value of B after const is added cannot be changed, that is, a constant.

Escape Character: '\ B' // return

'\ T' // Tab key

'\' // Backslash

'\ ''// Single quotes

'\ "' // Double quotation marks

'\ N' // line feed

'\ R' // enter