UNIX 7th Ed. - /usr/src/cmd/random.c

   1: #include <stdio.h>
   2: #define MAXINT 32768.
   3: float fract = 2;
   4: double  atof();
   5: char rflag,eflag,c;
   6: char ibuf[BUFSIZ],obuf[BUFSIZ],line[BUFSIZ];
   7: main(argc,argv) char **argv;
   8: {
   9:     long tvec;
  10:     int i;
  11:     for(i=1;i<argc;i++)
  12:     {   if(*argv[i]!='-')
  13:             fract=atof(argv[i]);
  14:         else if((c=argv[i][1])=='e')
  15:             eflag=1;
  16:         else if(c=='r')
  17:             rflag=1;
  18:     }
  19:     time(&tvec);
  20:     srand((int)tvec);
  21:     if(!rflag && !eflag)
  22:     {   setbuf(stdin,ibuf);
  23:         setbuf(stdout,obuf);
  24:     }
  25:     for(;eflag==0;)
  26:     {   gets(line);
  27:         if(feof(stdin)) break;
  28:         if(rand()/MAXINT*fract<1) puts(line);
  29:     }
  30:     exit((int)(rand()/MAXINT*fract));
  31: }

Defined functions

Defined variables

Defined macros