add some C operations

atoi
char_array
min
type size
unsigned char
xor
zero
htons_htonl_ntohs_ntohl
fgetpos_fsetpos, fileno, fopen_getc_putc_fclose, fprintf_fscanf, fputs_fgets, fread_fwrite, fseek_ftell
printf
ls
open_close_read_write
ungetc_fflush_setvbuf
input_output
string_operations
pointer
time

Signed-off-by: Lindell Xu <lxu@vetronicsltd.com.cn>