tcp49com.c

LinuxNetProgramming Linux网络编程基础实例

/* tcp49com.c */
#include <stdio.h> 
#include <stdlib.h> 
#include <string.h> 

  char *cmds[]={ 
    "help", 
    "say", 
    "hello", 
    "bye", 
    "exit", 
    NULL 
  }; 
  int getcmd(char *cmd) 
  { 
    int n=0; 
    while (cmds[n]!=NULL) { 
      if (strncasecmp(cmd,cmds[n],strlen(cmds[n]))==0) return n; 
      n++; 
    } 
    return -1; 
  } 
  void main(void) 
  { 
    char buf[1024]; 
    int ok; 
    printf("Welcome to goodie service!\n"); 
    fflush(stdout); 
    ok=0; 
    do { 
      while (fgets(buf,1023,stdin)==NULL); 
      switch (getcmd(buf)) { 
        case -1: printf("Unknown command!\n"); break; 
        case  0: printf("How may I help you, sir?\n"); break; 
        case  1: printf("I will say %s",&buf[3]); break; 
        case  2: printf("How're you doing today?\n"); break; 
        case  3: printf("Si ya, mate!\n");  ok=1; break; 
        case  4: printf("Go ahead!\n"); ok=1; break; 
      } 
      fflush(stdout); 
    } while (!ok); 
  }