C++入门

• What computer understand？
  bits
• Assembler Language
  • Limited structure
  • Global scope
  • Machine code
• Primitive High-Level Language
  -Function decomposition 功能分解
  -Data separation
  -High-level structure
• Block Structured Language
  • Encapsulation 封装
  • Flexible data scoping
  • Modularization
• Object-Oriented Language
• Inheritance 继承
• Polymorphism 多态
• Abstract data types 抽象数据类型

C++ history

• 1972, Dennis Ritche, C language

• 1980, Bjarne Stroustrup, C extension/ C language with class

• 1983, C++ named

• 1997, ANSI(American National Standards Institute) C++(standard C++)

• Standard C++: ANSI C++ is more scalable to different platform such as UNIX, Microsoft windows, Mac...高可移植性

• The standard C++ library got supported by most of industry providers.

• You'd better don't know C.

• We will try to avoid C library and C syntax.

• A C++ file can be with .cc, .cp, .cpp extensions.

• Supports data abstraction and objection-oriented programming

• Contains all existing features of C, making the migration from C to C++ relatively easy

• Is as portable and efficient as C

• Can be linked to existing C libraries and functions

• Provides strong static-type checking

• Is a general-purpose language

计算机基础知识

• 栈：系统自动管理的一小片内存空间
• 堆：交给程序员使用的一大片内存空间

Binary: 0101 1000
Decimal: 88
Hexadecimal: 0x58
1 byte= 8bits
负数用补码表示：正数二进制，按位取反，+1

• 编辑器：UNIX下vi编写源程序， 保存：wq，：x，ZZ
• 编译器：g++ -c得到目标文件
• 连接器：g++ 得到可执行文件（命令文件）