Dark horse base 01

Dark Horse 01

1. Principles of Computer Organization

• The computer system consists of software and hardware system components
• The role of the operating system
  • Using the control and management of system resources

2.python Basics

1. variable

   Memory for storing container data, which program is used to process data

   Naming rules:

   1. Variable names can be any combination of letters, numbers or underscore
   2. The first character variable names can not be digital

   Written by:

   1. hump
   2. Underline

2. Export

   • % S output string
   • % D signed decimal integer
   • f '' {} '' {} are variable discharge

   例：
       test = input('请输入整数：')
       aa = "我有%s岁了" % test

3. Arithmetic Operators

   • Order of priority: **higher * / % //than+ -
   • Commonly used () to process the priority

4. Data type conversion

   • int(x [,base ])	The integer x is converted to a
     complex(real [,imag ])	Create a complex, real is real, imag imaginary part

   • num1 = int(str1, 8) # 第二个参数为8，表示按8进制转换后显示，结果为 8

   • Other types of conversion