atof converts a string to a double 转换string到double型
atoi converts a string to an integer 转换string到int型
atol converts a string to a long 转换string到long型
isalnum true if a character is alphanumeric 为字符或数字返回true
isalpha true if a character is alphabetic 字符
iscntrl true if a character is a control character 控制字符
isdigit true if a character is a digit 数字
isgraph true if a character is a graphical character 图形字符
islower true if a character is lowercase 小写字符
isprint true if a character is a printing character 可打印字符
ispunct true if a character is punctuation 是否为一个标点
isspace true if a character is a space character 是否为空格
isupper true if a character is an uppercase character 大写
isxdigit true if a character is a hexidecimal character 十六进制
memchr searches an array for the first occurance of a character 搜索一个数组查出一个字符第一次出现的地方
memcmp compares two buffers 比较俩个缓冲区
memcpy copies one buffer to another 复制缓冲区到另一个
memmove moves one buffer to another 移动一个缓冲区到另一个
memset fills a buffer with a character 用一个字符充满一个缓冲区
strcat concatenates two strings 连接两个字符串
strchr finds the first occurance of a character in a string 找到一个字符在一个字符串里的第一次出现
strcmp compares two strings 比较两个字符串
strcoll compares two strings in accordance to the current locale 根据当前比较两个字符串
strcpy copies one string to another 复制字符串到另一个
strcspn searches one string for any characters in another 在其他字符中搜索一个字符串
strerror returns a text version of a given error code 返回错误码的一个字符串版本
strlen returns the length of a given string 返回给定字符串的长度
strncat concatenates a certain amount of characters of two strings 连接两个字符串里的固定数量的字串
strncmp compares a certain amount of characters of two strings 比较两个字串里的固定字符
strncpy copies a certain amount of characters from one string to another 从一个字串到另一个字串复制字符
strpbrk finds the first location of any character in one string, in another string 找到某个字符第一个位置
strrchr finds the last occurance of a character in a string 找到最后出现的位置
strspn returns the length of a substring of characters of a string 子串的长度
strstr finds the first occurance of a substring of characters 找到子串出现的位置
strtod converts a string to a double 转换string到double
strtok finds the next token in a string 在一个字串里面找下一个出现
strtol converts a string to a long 转换成long
strtoul converts a string to an unsigned long 转换成无符号long
strxfrm converts a substring so that it can be used by string comparison functions
tolower converts a character to lowercase
toupper converts a character to uppercase
posted @ 2008-08-07 18:51
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