pointers on c 十三章 13.5

#include <stdio.h>
#include<string.h>
#define NUL 0
char ** do_args(int arfc, char **argv,char *control,
                void (*do_arg)(int ch,char *value),
                void (*illegal_arg)(int ch) ){
    char *temp;
    char *index;
    char * token;
    int ch; //Save **arg to compare '-'
    
    for(temp = *++argv; *temp != NUL && *temp == '-';){
        ch= *++temp;// - last char
        if( (index = strchr(control,ch)  ) ){
            switch( *++index){//index 指向control对应字符后面那个字符
                case '+' :// 就有对应的值
                    if(*++temp != ' '){
                        token = strtok(control," ") ; //分隔字符串
                        do_arg(ch,temp);
                        temp = strtok(NULL," "); //定位到下一个空格处
                    }
                          else {
                              while(*temp++==' ');
                              token = strtok(temp," ") ;
                              do_arg(ch,token);
                              temp = strtok(NULL," ");
                         }
                                     break;
                default:
                    do_arg(ch,NULL);
            }
        }
          else
              illegal_arg(ch);
               temp++;
    }
    
    return ++argv;
}

不知道对不对555