Create ex_33.cpp

ch17/ex_33.cpp

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+/***************************************************************************
+*  @file       main.cpp
+*  @author     qwert2603
+*  @date       13 Apr 2015
+*  @remark     This code is for the exercises from C++ Primer 5th Edition
+*  @note
+***************************************************************************/
+
+#include <iostream>
+using std::cout;
+using std::endl;
+
+#include <fstream>
+using std::ifstream;
+
+#include <string>
+using std::string;
+
+#include <vector>
+using std::vector;
+
+#include <random>
+using std::default_random_engine;
+using std::uniform_int_distribution;
+
+#include <ctime>
+using std::time;
+
+#include <algorithm>
+using std::sort;
+using std::find_if;
+
+#inclide <utility>
+using std::pair;
+
+
+int main() {
+	typedef pair<string, string> ps;
+	ifstream i("d.txt");
+	vector<ps> dict;
+	string str1, str2;
+	// read wirds from dictionary
+	while (i >> str1 >> str2) {
+		dict.emplace_back(str1, str2);
+	}
+	i.close();
+	// sort words in vector
+	sort(dict.begin(), dict.end(), [](const ps &_ps1, const ps &_ps2){return _ps1.first < _ps2.first; });
+	i.open("i.txt");
+	default_random_engine e(time(0));
+	// read words from text
+	while (i >> str1) {
+	  // find word in dictionary
+		vector<ps>::const_iterator it = find_if(dict.cbegin(), dict.cend(),
+		  [&str1](const ps &_ps){return _ps.first == str1; });
+		// if word doesn't exist in dictionary
+		if (it == dict.cend()) {
+		  // write it itself
+			cout << str1 << ' ';
+		}
+		else {
+		  // get random meaning of word 
+			uniform_int_distribution<unsigned> u (0, find_if(dict.cbegin(), dict.cend(),
+			 [&str1](const ps &_ps){return _ps.first > str1; }) - it - 1);
+			// write random meaning
+			cout << (it + u(e))->second << ' ';
+		}
+	}
+
+	return 0;
+}