# c_libs

**Repository Path**: supertom-spec/c_libs

## Basic Information

- **Project Name**: c_libs
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-09-29
- **Last Updated**: 2021-11-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# C libs for conveniently programming

## C keywords

- 修饰：auto, const, signed, unsigned, register, volatile, typedef
- 类型：char, double, float, int, long, short, enum, struct, union, void, sizeof
- 控制：for, while, do, if, else, goto, switch, case, break, continue, default, return
- 工程：static, extern

## ANSI

### stdio.h

- fopen, fclose, getc, ungetc, putc, fgets, fputs
- printf, fprintf, sprintf, scanf, fscanf, sscanf
- remove, rename, tmpname

### stdlib.h

- abs, rand, srand
- malloc, free

### math.h

- fabs, floor, ceil
- fmod, sqrt, pow, exp, log
- sin, cos, atan, atan2

### ctype.h

- toupper, tolower
- isalpha, isupper, islower, isdigit, isalnum
- ispunct, isspace

### string.h

- strlen, strcmp, strncmp, strcpy, strncpy, strcat, strncat
- strchr, strrchr, strstr

## Form Eric S. Roberts

### genlib.h

- 类型：``bool``, ``string``, ``stream``
- 常量：``UNDEFINED`` 指针
- 内存分配与垃圾回收：
  - 申请内存：``ptr = (type) GetBlock(nbytes)``
  - 释放内存：``FreeBlock(ptr)``
  - 为指针申请内存：``p = New(type *)``，相当于 p = (type *)malloc(sizeof(type))
  - 为数组申请内存：``p = NewArray(n, type)``
- 错误处理：``void Error(string msg, ...)``
- 控制流：``repeat { ... }``，相当于 while (TRUE)

### simpio.h

- 从用户输入获取数据：
  - ``int i = GetInteger()``
  - ``long l = GetLong()``
  - ``double f = GetReal()``
  - ``string s = GetLine()``
  - ``string ReadLine(FILE *infile)``

### strlib.h

- 字符串拼接：``string Concat(string s1, string s2)``
- 字符串指标：``char IthChar(string s, int i)``，相当于 s[i]
- 子字符串：``string SubString(string s, int p1, int p2)``
- 单字符转换为串：``string CharToString(char ch)``
- 字符串长度：``int StringLength(string s)``
- 复制字符串：``string CopyString(string s)``
- 判断相等：``bool StringEqual(string s1, string s2)``
- 字符串比较：``int StringCompare(string s1, string s2)``，相当于 strcmp(s1, s2)
- 在 text 中查找 ch 字符：``int FindChar(char ch, string text, int start)``
- 在 text 中查找 str 字符串：``int FindString(string str, string text, int start)``
- 转为小写：``string ConvertToLowerCase(string s)``
- 转为大写：``string ConvertToUpperCase(string s)``
- 数字 123 转化为 “123” 字符串表示：``string IntegerToString(int n)``
- 字符串 “123” 转化为 123 数字表示：``int StringToInteger(string s)``
- 浮点数转化为字符串表示：``string RealToString(double d)``
- 字符串表示为浮点数表示：``double StringToReal(string s)``

### random.h

- 初始化：``void Randomize(void)``
- 随机整数：``int RandomInteger(int low, int high)``
- 随机浮点数：``double RandomReal(double low, double high)``
- 按 p 概率返回 TRUE: ``bool RandomChance(double p)``