嵌入式Linux开发常用C语言标准库函数

推荐两个网站：
http://www.cplusplus.com/
各大语言基础入门必备网站
菜鸟教程：http://www.runoob.com/

标准输入/输出类函数

scanf()

http://www.runoob.com/cprogramming/c-function-scanf.html

printf()

http://www.runoob.com/cprogramming/c-function-printf.html

putchar()

http://www.runoob.com/cprogramming/c-function-putchar.html

getchar()

http://www.runoob.com/cprogramming/c-function-getchar.html

putc()

http://www.runoob.com/cprogramming/c-function-putc.html

getc()

http://www.runoob.com/cprogramming/c-function-getc.html

puts()

http://www.runoob.com/cprogramming/c-function-puts.html

ungetc()

http://www.runoob.com/cprogramming/c-function-ungetc.html

字符处理及转换函数

sdigit()

http://www.runoob.com/cprogramming/c-function-isdigit.html

sprintf()

http://www.cplusplus.com/reference/cstdio/sprintf/

strncat()

http://www.runoob.com/cprogramming/c-function-strncat.html

strlen()

http://www.runoob.com/cprogramming/c-function-strlen.html

strchr()

http://www.runoob.com/cprogramming/c-function-strchr.html

strstr()

http://www.runoob.com/cprogramming/c-function-strstr.html

memset()

http://www.runoob.com/cprogramming/c-function-memset.html

memmove()

http://www.runoob.com/cprogramming/c-function-memmove.html

memcpy()

http://www.runoob.com/cprogramming/c-function-memcpy.html

memcmp()

http://www.runoob.com/cprogramming/c-function-memcmp.html