C语言函数库详解(收藏)
puts:将字符串输出到终端函数 ............................................................................... 37 remove:删除文件函数.............................................................................................. 38 rename:重命名文件函数 .......................................................................................... 38 rewind:重置文件指针函数 ...................................................................................... 39 scanf:格式化输入函数 ............................................................................................. 40 setbuf、setvbuf:指定文件流的缓冲区函数 ............................................................ 41 sprintf:向字符串写入格式化数据函数 ................................................................... 42 sscanf:从缓冲区中读格式化字符串函数................................................................ 42 tmpfile:创建临时文件函数 ...................................................................................... 43 tmpnam:创建临时文件名函数44 ungetc:把字符退回到输入流函数 .44
第三章(字符处理函数)46 isalnum:检查字符是否是字母或数字 .46 isalpha:检查字符是否是字母47 isascii:检查字符是否是ASCII码48 iscntrl:检查字符是否是控制字符48 isdigit:检查字符是否是数字字符49 isgraph 50 islower:检查字符是否是小写字母 .50 isprint51 ispunct:检查字符是否是标点字符 52 isspace:检查字符是否是空格符 52 isupper .53 isxdigit.......................................................... 54 toascii:将字符转换为 .54 tolower55 toupper56
第四章(字符串函数)56 ....................................................................................... 57 atoi58 atol........................................................................................ 58 59 ....................................................................................... 60 memcpy: ...................................................................................... 61 memmove ....................................................................................... 62 memset ............................................................................................. 63 strcat:字符串连接函数 ............................................................................................. 64 strchr:字符串中字符首次匹配函数 ........................................................................ 64 strcmp:字符串比较函数 ........................................................................................... 65 strcpy:字符串拷贝函数 ............................................................................................ 66 strcspn:字符集逆匹配函数 ...................................................................................... 67 strdup:字符串新建拷贝函数.................................................................................... 68 strerror:字符串错误信息函数 .................................................................................. 69 strlen:计算字符串长度函数 ..................................................................................... 70
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