#include<stdio.h>

#include<string.h>

#include<limits.h>

#include<unistd.h>

#include<sys/types.h>



#define PROMPT_STRING "[myshell]$"

#define QUIT_STRING "exit\n"



static char inbuf[MAX_CANON]

char * g_ptr

char * g_lim



extern void yylex()



int main (void){

for( ){

if(fputs(PROMPT_STRING,stdout)==EOF)

continue

if(fgets(inbuf,MAX_CANON,stdin)==NULL)

continue

if(strcmp(inbuf,QUIT_STRING)==0)

break

g_ptr = inbuf

g_lim = inbuf + strlen(inbuf)

yylex()

}

return 0

}

-# Include <stdio.h># Include <string.h># Include <limits.h># Include <unistd.h># Include <sys/types.h># Define PROMPT_STRING　[myshell] $ # define QUIT_STRING　exit　static char inbuf [MAX_CANON] char* g_ptr char* g_lim extern void yylex () int main (void) (for () (if (fputs (PROMPT_STRING, stdout) == EOF) continue if (fgets (inbuf, MAX_CANON, stdin) == NULL) continue if (strcmp (inbuf, QUIT_STRING) == 0) break g_ptr = inbuf g_lim = inbuf+ strlen (inbuf) yylex ()) return 0)