ideality

#include <stdio.h>

#define PAGELEN 24

#define LINELEN 512

void do_more(FILE *);

int see_more(FILE *);

int main(int ac,char *av[])

{

      FILE *fp;

      if (ac==1)

             do_more(stdin);

      else

             while(--ac)

                  if((fp=fopen(*++av,"r"))!=NULL)

                    {

                        do_more(fp);

                         fclose(fp);

                      }

                     else

                         exit(1);

          return 0;

}

void do_more(FILE *fp)

{

      char line[LINELEN];

      int num_of_lines=0;

      int see_more(FILE *),reply;

      FILE *fp_tty;

     fp_tty=fopen("/dev/tty","r");

      if (fp_tty==NULL)

          exit(1);

       while(fgets(line,LINELEN,fp))

        {

            if (num_of_lines==PAGELEN)

               {

                   reply=see_more(fp_tty);

                   if (reply==0)

                        break;

                    num_of_lines-=reply;

                  }

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

                    exit(1);

                 num_of_lines++;

             }

            int see_more(FILE *cmd)

           {

                int c;

                printf(¡°\033[7m more? \033[m¡±);

                while((c=getc(cmd))!=EOF)

                {

                    if (c=='q')

                       return 0;

                     if (c==' ¡®)

                       return PAGELEN;

                     if (c=='\n')

                        return 1;

                    }

                    return 0;

                }