home *** CD-ROM | disk | FTP | other *** search
- // Non-printed example in "Thinking in C++" by Bruce Eckel
- //////////////////////////////////////////////////
- // From the compressed package ECKELT01.ZIP 2/21/95
- // Copyright (c) Bruce Eckel, 1995
- // Source code file from the book "Thinking in C++",
- // Prentice Hall, 1995, ISBN: 0-13-917709-4
- // All rights reserved EXCEPT as allowed by the following
- // statements: You may freely use this file for your own
- // work, including modifications and distribution in
- // executable form only. You may copy and distribute this
- // file, as long as it is only distributed in the complete
- // (compressed) package with the other files from this
- // book and you do not remove this copyright and notice.
- // You may not distribute modified versions of the source
- // code in this package. This package may be freely placed
- // on bulletin boards, internet nodes, shareware disks and
- // product vendor disks. You may not use this file in
- // printed media without the express permission of the
- // author. Bruce Eckel makes no
- // representation about the suitability of this software
- // for any purpose. It is provided "as is" without express
- // or implied warranty of any kind. The entire risk as to
- // the quality and performance of the software is with
- // you. Should the software prove defective, you assume
- // the cost of all necessary servicing, repair, or
- // correction.
- // If you think you've found an error, please
- // email all modified files with loudly commented changes
- // to: eckel@aol.com (please use the same
- // address for non-code errors found in the book).
- //////////////////////////////////////////////////
-
- //: ITS.CPP -- Find "it's" & 2 enclosing words
- #include <fstream.h>
- #include <string.h>
- #include <ctype.h>
- #include "..\allege.h"
-
- // Emit count words to cout:
- void emitword(char* s, int count = 1) {
- for(int i = 0; i < count; i++) {
- while(!isspace(*s) && *s != 0) cout << *s++;
- while(isspace(*s) && *s != 0) cout << *s++;
- }
- }
-
- // Move the argument pointer forward by words:
- void forwardword(char*& s, int count = 1) {
- for(int i = 0; i < count; i++) {
- while(!isspace(*s) && *s != 0) s++;
- while(isspace(*s) && *s != 0) s++;
- }
- }
-
- // Move the argument pointer back by words:
- void backwardword(char*& s, int count = 1) {
- for(int i = 0; i < count; i++) {
- while(!isspace(*s) && *s != 0) s--;
- while(isspace(*s) && *s != 0) s--;
- while(!isspace(*s) && *s != 0) s--;
- s++; // Point to start of word
- }
- }
- // Char* c; // debug aid
- main(int argc, char* argv[]) {
- allege(argc >= 2,
- "usage: its textfile word(=it's) pad(=1)\n"
- "finds the word and the pad words "
- "surrounding it for grammar syntax check");
- const char* word = (argc >= 3 ? argv[2] : "it's");
- const int pad = (argc == 4 ? atoi(argv[3]) : 1);
- ifstream in(argv[1]);
- allegefile(in);
- const sz = 4096;
- char _buf[sz + 10] = {0}; // Set to zero
- char* const buf = _buf + 10; // Pad beginning w/ zeroes
- while(in.getline(buf,sz)) {
- char* c = buf;
- while((c = strstr(c, word)) != 0) {
- backwardword(c, pad);
- emitword(c, 2*pad + 1);
- cout << endl;
- forwardword(c, 2*pad + 1);
- }
- }
- }
-
-