《C/C++函数与算法》(Yanlz+VR云游戏+Unity+SteamVR+云计算+5G+AI+stdio+string+math+time+vector+list+map+立钻哥哥+==)

C/C++函数与算法

C/C++函数与算法

版本

作者

参与者

完成日期

备注

YanlzCC++_Algorithm_V01_1.0

严立钻

 

2020.01.17

 

 

 

 

 

 

##《C/C++函数与算法》发布说明:

++++“C/C++函数与算法”:是对“C++C铸就生存利器”的综合探索;C/C++作为万能语言,可以开发嵌入式、物联网,也可以开发游戏(Cocos2dx、UE4)

++++“C/C++函数与算法”:定位在一个科普类知识,了解C/C++相关库和算法

 

@@提示:有些博客可能只是开了头,如果感兴趣的同学,可以“点赞”或“评论区留言”,只要关注的同学多了,那就会继续完善哟!(“++==”,表示没有写完的,如果关注度不高就不完善了;“++ok++”,表示此篇博客已经完成,是阶段性完整的!)

 

 

$$$$博客溯源:

 

++++VR云游戏=Unity+SteamVR+云技术+5G+AI;(说明:AI人工智能不是我们的主要研究技术,只是了解一下,领略一下有风的感觉!但是,VR是我们的研究重点

 

 

 

##《C/C++函数与算法》目录

#第一篇:C语言函数

#第二篇:C++输入/输出

#第三篇:标准容器

#第四篇:算法

#第五篇:立钻哥哥带您C/C++编程

 

 

 

 

#第一篇:C语言函数

#第一篇:C语言函数

#第一篇:C语言函数

++++立钻哥哥:C语言和C++语言的类库丰富,利用这些函数可以实现各种功能,这就需要我们掌握CC++最为常用的函数;在第四篇还会介绍常用的算法,算法是程序员设计的灵魂

++++A1、ctype.h

++++A2、stdio.h

++++A3、string.h

++++A4、stdlib.h

++++A5、math.h

++++A6、conio.h

++++A7、graphics.h

++++A8、stdarg.h

++++A9、time.h

++++A10、dir.h

++++A11、立钻哥哥带您了解其他C函数库

++A1、ctype.h

++A1、ctype.h

++A1、ctype.h(字符操作函数)

++++立钻哥哥:ctype.h包含C语言中的字符测试函数、字符转换函数;ctype.h库函数在C++中调用:#include <cctype>

#注意:C++标准库也同样包含C标准库,使用时在库名前加c,例如,C标准库中的ctype.h在C++中则变为cctype

++++A1.1、字符测试函数

++++A1.2、字符转换函数

 

 

 

++A1.1、字符测试函数

++A1.1、字符测试函数

++A1.1、字符测试函数

++++立钻哥哥:C语言中的字符测试函数可以判断字符属于何种类型:数字字符、英文字母、空白字符、小写英文字母、大写英文字母、可打印字符、ASCII码的范围等

++++A1.1.1、isalnum

++++A1.1.2、isalpha

++++A1.1.3、isascii

++++A1.1.4、iscntrl

++++A1.1.5、isdigit

++++A1.1.6、isgraph

++++A1.1.7、islower

++++A1.1.8、isprint

++++A1.1.9、ispunct

++++A1.1.10、isspace

++++A1.1.11、isxdigit

++++A1.1.1、isalnum

++++A1.1.1、isalnum

++A1.1.1、isalnum

++++立钻哥哥:isalnum函数是判断字符是否是英文字母或数字字符

int isalnum(int ch);

++++A1.1.2、isalpha

++++A1.1.2、isalpha

++A1.1.2、isalpha

++++立钻哥哥:函数isalpha的作用是判断ch是否是英文字母

int isalpha(int ch);

 

 

 

++++A1.1.3、isascii

++++A1.1.3、isascii

++A1.1.3、isascii

++++立钻哥哥:函数isascii的作用是判断chASCII码是否位于0~127之间

int isascii(int ch);

++++A1.1.4、iscntrl

++++A1.1.4、iscntrl

++A1.1.4、iscntrl

++++立钻哥哥:函数iscntrl的作用是判断ch是否是控制字符,即ASCII码是否位于0~31之间或等于0x7fDelete键的ASCII码)

int iscntrl(int ch);

++++A1.1.5、isdigit

++++A1.1.5、isdigit

++A1.1.5、isdigit

++++立钻哥哥:函数isdigit的作用是判断ch是否是数字字符,即是否是0~9之间的字符

int isdigit(int ch);

 

 

 

++++A1.1.6、isgraph

++++A1.1.6、isgraph

++A1.1.6、isgraph

++++立钻哥哥:函数isgraph的作用是判断ch是否是除了空格外的可打印字符

int isgraph(int ch);

++++A1.1.7、islower

++++A1.1.7、islower

++A1.1.7、islower

++++立钻哥哥:函数islower的作用是判断ch是否是小写英文字母

int islower(int ch);

++++A1.1.8、isprint

++++A1.1.8、isprint

++A1.1.8、isprint

++++立钻哥哥:函数isprint的作用是判断ch是否是可打印字符(包括空格符)

int isprint(int ch);

 

 

 

++++A1.1.9、ispunct

++++A1.1.9、ispunct

++A1.1.9、ispunct

++++立钻哥哥:函数ispunct的作用是判断ch是否是标点符号

int ispunct(int ch);

 

 

 

++++A1.1.10、isspace

++++A1.1.10、isspace

++A1.1.10、isspace

++++立钻哥哥:函数isspace的作用是判断ch是否是空白符,空白符包括空格符、水平制表符、回车符等

int isspace(int ch);

 

 

 

++++A1.1.11、isxdigit

++++A1.1.11、isxdigit

++A1.1.11、isxdigit

++++立钻哥哥:函数isxdigit的作用是判断ch是否是十六进制数字0~9A~Fa~f)对应的字符

int isxdigit(int ch);

++A1.2、字符转换函数

++A1.2、字符转换函数

++A1.2、字符转换函数

++++立钻哥哥:字符转换函数包括3个:将大写英文字母转换为小写英文字母、将小写英文字母转换为大写英文字母、将字符转换为ASCII

++++A1.2.1、tolower

++++A1.2.2、toupper

++++A1.2.3、toascii

++++A1.2.1、tolower

++++A1.2.1、tolower

++A1.2.1、tolower

++++立钻哥哥:如果chA~Z之间的大写英文字母,函数tolower会将ch转换为a~z之间的小写英文字母

int tolower(int ch);

 

 

 

++++A1.2.2、toupper

++++A1.2.2、toupper

++A1.2.2、toupper

++++立钻哥哥:函数toupper的作用是将小写英文字母a~z转换为大写英文字母A~Z

int toupper(int ch);

 

 

 

++++A1.2.3、toascii

++++A1.2.3、toascii

++A1.2.3、toascii

++++立钻哥哥:函数toascii的作用是将字符转换为相应的ASCII

int toascii(int ch);

 

 

 

 

 

 

++A2、stdio.h

++A2、stdio.h

++A2、stdio.h

++++立钻哥哥:头文件stdio.h包含C语言的标准输入和输出函数,这些函数可分为字符输入/输出函数、格式化输入/输出函数、文件的输入/输出函数、文件定位函数、文件存取函数、错误控制函数

++++A2.1、字符输入/输出函数

++++A2.2、格式化输入/输出函数

++++A2.3、文件输入/输出函数

++++A2.4、文件定位函数

++++A2.5、文件存取操作函数

++++A2.6、文件错误控制函数

++++A2.7、立钻哥哥带您stdio.h的综合应用

++A2.1、字符输入/输出函数

++A2.1、字符输入/输出函数

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