#include <stdio.h> #define MAXINT 32768. float fract = 2; double atof(); char rflag,eflag,c; char ibuf[BUFSIZ],obuf[BUFSIZ],line[BUFSIZ]; main(argc,argv) char **argv; { long tvec; int i; for(i=1;i<argc;i++) { if(*argv[i]!='-') fract=atof(argv[i]); else if((c=argv[i][1])=='e') eflag=1; else if(c=='r') rflag=1; } time(&tvec); srand((int)tvec); if(!rflag && !eflag) { setbuf(stdin,ibuf); setbuf(stdout,obuf); } for(;eflag==0;) { gets(line); if(feof(stdin)) break; if(rand()/MAXINT*fract<1) puts(line); } exit((int)(rand()/MAXINT*fract)); }