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