赋值、算术运算符与类型转换

imodou 2023-01-12 22:59:12

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赋值、算术运算符与类型转换

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第1章　PHP 5基础 1.1　简介 1.1.1 PHP是什么 1.1.2　初步认识PHP代码 1.2　PHP的安装 1.2.1　Linux下安装.Apache和PHP 1.2.2　Windows下安装Apache和PHP 1.3　PHP配置 1.3.1　PHP配置文件 1.3.2　PHP常用配置选项 1.3.3　加载扩展库 1.4　本章小结第2章　网站开发语法基础 2.1　基本语法 2.2　数据类型 2.2.1　布尔型 2.2.2　整型 2.2.3　浮点型 2.2.4　字符串 2.2.5　数组 2.2.6　对象 2.2.7　资源 2.2.8　NULL 2.2.9　类型转换 2.3　变量 2.3.1　变量的赋值 2.3.2　预定义变量 2.3.3　变量作用域 2.3.4　可变变量 2.4　常量 2.4.1 自定义常量 2.4.2 魔术常量 2.5　表达式 2.6　运算符 2.6.1　算术运算符 2.6.2　字符串运算符 2.6.3　比较运算符 2.6.4　逻辑运算符 2.6.5　位运算符 2.6.6　赋值运算符 2.6.7　数组运算符 2.6.8　类型运算符 2.6.9　错误控制运算符 2.6.10　执行运算符 2.6.11　运算符的优先级 2.7　流程控制 2.7.1　if结构 2.7.2 switch结构 2.7.3 while循环 2.7.4 for循环 2.7.5 foreach语句 2.7.6 declare语句 2.7.7 exit和retunl语句 2.8　包含代码 2.9　本章小结第3章　函数 3.1　用户自定义函数 3.1.1 函数调用与函数定义 3.1.2　递归函数 3.2　函数的参数 3.2.1　按值传递参数 3.2.2　通过引用传递 3.2.3　默认参数值 3.2.4　可变长度参数列表 3.3　函数返回值第4章　类与对象第5章　字符串第6章　数组第7章　PHP高级应用技术第8章　PHP模板第9章　MySQL快速入门第10章　MySQL数据库管理第11章　MySQL5进阶第12章　文章发布系统第13章　电子商务系统

The C programming Language 第二版英文版內容列表 Table of Contents Preface.......................................................... Preface to the first edition..................................... Introduction..................................................... Chapter 1 - A Tutorial Introduction.............................. 1.1 Getting Started................................ 1.2 Variables and Arithmetic Expressions........... 1.3 The for statement.............................. 1.4 Symbolic Constants............................. 1.5 Character Input and Output..................... 1.5.1 File Copying.......................... 1.5.2 Character Counting.................... 1.5.3 Line Counting......................... 1.5.4 Word Counting......................... 1.6 Arrays......................................... 1.7 Functions...................................... 1.8 Arguments - Call by Value...................... 1.9 Character Arrays............................... 1.10 External Variables and Scope.................. Chapter 2 - Types, Operators and Expressions..................... 2.1 Variable Names................................. 2.2 Data Types and Sizes........................... 2.3 Constants...................................... 2.4 Declarations................................... 2.5 Arithmetic Operators........................... 2.6 Relational and Logical Operators............... 2.7 Type Conversions............................... 2.8 Increment and Decrement Operators.............. 2.9 Bitwise Operators.............................. 2.10 Assignment Operators and Expressions.......... 2.11 Conditional Expressions....................... 2.12 Precedence and Order of Evaluation............ Chapter 3 - Control Flow......................................... 3.1 Statements and Blocks.......................... 3.2 If-Else........................................ 3.3 Else-If........................................ 3.4 Switch......................................... 3.5 Loops - While and For.......................... 3.6 Loops - Do-While............................... 3.7 Break and Continue............................. 3.8 Goto and labels................................ Chapter 4 - Functions and Program Structure...................... 4.1 Basics of Functions............................ 4.2 Functions Returning Non-integers............... 4.3 External Variables............................. 4.4 Scope Rules.................................... 4.5 Header Files................................... 4.6 Static Variables................................ 4.7 Register Variables.............................. 4.8 Block Structure................................. 4.9 Initialization.................................. 4.10 Recursion...................................... 4.11 The C Preprocessor............................. 4.11.1 File Inclusion........................ 4.11.2 Macro Substitution.................... 4.11.3 Conditional Inclusion................. Chapter 5 - Pointers and Arrays.................................. 5.1 Pointers and Addresses......................... 5.2 Pointers and Function Arguments................ 5.3 Pointers and Arrays............................ 5.4 Address Arithmetic............................. 5.5 Character Pointers and Functions............... 5.6 Pointer Arrays; Pointers to Pointers........... 5.7 Multi-dimensional Arrays....................... 5.8 Initialization of Pointer Arrays............... 5.9 Pointers vs. Multi-dimensional Arrays.......... 5.10 Command-line Arguments........................ 5.11 Pointers to Functions......................... 5.12 Complicated Declarations...................... Chapter 6 - Structures........................................... 6.1 Basics of Structures........................... 6.2 Structures and Functions....................... 6.3 Arrays of Structures........................... 6.4 Pointers to Structures......................... 6.5 Self-referential Structures.................... 6.6 Table Lookup................................... 6.7 Typedef........................................ 6.8 Unions......................................... 6.9 Bit-fields..................................... Chapter 7 - Input and Output..................................... 7.1 Standard Input and Output....................... 7.2 Formatted Output - printf....................... 7.3 Variable-length Argument Lists.................. 7.4 Formatted Input - Scanf......................... 7.5 File Access..................................... 7.6 Error Handling - Stderr and Exit................ 7.7 Line Input and Output........................... 7.8 Miscellaneous Functions......................... 7.8.1 String Operations...................... 7.8.2 Character Class Testing and Conversion. 7.8.3 Ungetc................................. 7.8.4 Command Execution...................... 7.8.5 Storage Management..................... 7.8.6 Mathematical Functions................. 7.8.7 Random Number generation............... Chapter 8 - The UNIX System Interface............................ 8.1 File Descriptors............................... 8.2 Low Level I/O - Read and Write................. 8.3 Open, Creat, Close, Unlink..................... 8.4 Random Access - Lseek.......................... 8.5 Example - An implementation of Fopen and Getc.. 8.6 Example - Listing Directories.................. 8.7 Example - A Storage Allocator.................. Appendix A - Reference Manual.................................... A.1 Introduction................................... A.2 Lexical Conventions............................ A.2.1 Tokens................................ A.2.2 Comments.............................. A.2.3 Identifiers........................... A.2.4 Keywords.............................. A.2.5 Constants............................. A.2.6 String Literals....................... A.3 Syntax Notation................................ A.4 Meaning of Identifiers......................... A.4.1 Storage Class......................... A.4.2 Basic Types........................... A.4.3 Derived types......................... A.4.4 Type Qualifiers....................... A.5 Objects and Lvalues............................ A.6 Conversions.................................... A.6.1 Integral Promotion.................... A.6.2 Integral Conversions.................. A.6.3 Integer and Floating.................. A.6.4 Floating Types........................ A.6.5 Arithmetic Conversions................ A.6.6 Pointers and Integers................. A.6.7 Void.................................. A.6.8 Pointers to Void...................... A.7 Expressions.................................... A.7.1 Pointer Conversion.................... A.7.2 Primary Expressions................... A.7.3 Postfix Expressions................... A.7.4 Unary Operators....................... A.7.5 Casts................................. A.7.6 Multiplicative Operators.............. A.7.7 Additive Operators.................... A.7.8 Shift Operators....................... A.7.9 Relational Operators.................. A.7.10 Equality Operators................... A.7.11 Bitwise AND Operator................. A.7.12 Bitwise Exclusive OR Operator........ A.7.13 Bitwise Inclusive OR Operator........ A.7.14 Logical AND Operator................. A.7.15 Logical OR Operator.................. A.7.16 Conditional Operator................. A.7.17 Assignment Expressions............... A.7.18 Comma Operator.......................... A.7.19 Constant Expressions.................... A.8 Declarations..................................... A.8.1 Storage Class Specifiers................. A.8.2 Type Specifiers.......................... A.8.3 Structure and Union Declarations......... A.8.4 Enumerations............................. A.8.5 Declarators.............................. A.8.6 Meaning of Declarators................... A.8.7 Initialization........................... A.8.8 Type names............................... A.8.9 Typedef.................................. A.8.10 Type Equivalence........................ A.9 Statements....................................... A.9.1 Labeled Statements....................... A.9.2 Expression Statement..................... A.9.3 Compound Statement....................... A.9.4 Selection Statements..................... A.9.5 Iteration Statements..................... A.9.6 Jump statements.......................... A.10 External Declarations........................... A.10.1 Function Definitions.................... A.10.2 External Declarations................... A.11 Scope and Linkage............................... A.11.1 Lexical Scope........................... A.11.2 Linkage................................. A.12 Preprocessing................................... A.12.1 Trigraph Sequences...................... A.12.2 Line Splicing........................... A.12.3 Macro Definition and Expansion.......... A.12.4 File Inclusion.......................... A.12.5 Conditional Compilation................. A.12.6 Line Control............................ A.12.7 Error Generation........................ A.12.8 Pragmas................................. A.12.9 Null directive.......................... A.12.10 Predefined names....................... A.13 Grammar......................................... Appendix B - Standard Library.................................... B.1.1 File Operations................................ B.1.2 Formatted Output......................... B.1.3 Formatted Input.......................... B.1.4 Character Input and Output Functions..... B.1.5 Direct Input and Output Functions........ B.1.6 File Positioning Functions............... B.1.7 Error Functions.......................... B.2 Character Class Tests: ................. B.3 String Functions: ..................... B.4 Mathematical Functions: ................. B.5 Utility Functions: ....................

算术运算符、关系运算符、逻辑运算符、赋值运算符详解与优先级关系一、算术运算符二、关系运算符三、逻辑运算符四、赋值运算符 四种运算符优先级关系：算术运算符>关系运算符>逻辑运算符>赋值运算符 一、算术运算符 public static void main(String[] args){ //除号： / int q = 12; int w = 5; double result1 = q / w;// 2.0 double result3 = q /

C语言的运算符非常丰富，主要有三大类运算符：算术运算符、关系运算符、逻辑运算符。关系运算符：> 大于 = 大于等于关系 > 逻辑 > 赋值 > 逗号。位运算符：右移 ~取反 |或 &与 ^异或。赋值运算符：=赋值 +=、-=、*=、\=复合赋值符。逻辑运算符：&&逻辑与 ||逻辑或!分量运算符：·成员 ->指向。指针运算符：*间接 &取地址。

文章目录算术运算符关系运算符逻辑运算符赋值运算符 算术运算符 算术运算符有：+ - * / % ++ – ++分为前置++ 和后置++，这俩者有所不同。前置++是先加后用，后置++是先用后加。前置–是先加后用，后置–是先用后加。如下：我们可以看出++a在a++之前，也就是说 ++a和a++屏幕显示的是6。 public class s{ public static void main(String[] args) { int a,b; a=

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