#include main() { char buf[BUFSIZ]; char lbuf[BUFSIZ]; int first = 1; while(fgets(buf,BUFSIZ,stdin)) { if(!first) { if(strncmp(lbuf,buf,13) == 0) { if(strncmp(&lbuf[45],"0.00",4) == 0) fputs(buf,stdout); else fputs(lbuf,stdout); } else fputs(buf,stdout); } strcpy(lbuf,buf); first = 0; } }