wordlist.cpp

来自「Thinking in C++ 2nd edition source code 」· C++ 代码 · 共 37 行

//: C20:WordList.cpp
// From Thinking in C++, 2nd Edition
// at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Display a list of words used in a document
#include <string>
#include <cstring>
#include <set>
#include <iostream>
#include <fstream>
#include "../require.h"
using namespace std;

const char* delimiters =
  " \t;()\"<>:{}[]+-=&*#.,/\\~";

int main(int argc, char* argv[]) {
  requireArgs(argc,  2);
  std::ifstream in(argv[1]);
  assure(in, argv[1]);
  std::set<std::string> wordlist;
  std::string line;
  while(getline(in, line)) {
    // Capture individual words:
    char* s = // Cast probably won't crash:
      strtok((char*)line.c_str(), delimiters);
    while(s) {
      wordlist.insert(s); // Auto type conv.
      s = strtok(0, delimiters);
    }
  }
  // Output results:
  std::copy(wordlist.begin(), wordlist.end(),
       ostream_iterator<string>(cout, "\n"));
} ///:~