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Commit 61fdc81

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Exercise 23.6; Exercise 23.7; Exercise 23.8
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‎Chapter_23/C23_Exercise_23.6.cpp

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/* Exercise 23.6 */
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#include<iostream>
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#include<istream>
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#include<fstream>
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#include<sstream>
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#include<iomanip>
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#include<string>
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#include<vector>
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#include<regex>
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#include"C23_Exercise_23.6.h"
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using namespace std;
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inline void error(string s) { throw runtime_error(s); }
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inline void error(const string& s, const string& s2) { error(s + s2); }
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inline void error(const string& s, int i) { ostringstream os; os << s << ": " << i; error(os.str()); }
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inline void keep_window_open() { char ch; cin >> ch; }
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int main()
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{
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enum Action {
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EXIT = -1, PRINTACTIONLIST,
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CASE1, CASE2, CASE3, CASE4, CASE5
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};
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const string actionList = "\tList of actions:\n"
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" (1) IsDate()\n"
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" (-1) Exit, (0) Print the list of actions\n";
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cout << actionList;
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int action;
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bool cond{ true };
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while (cond) try {
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cout << "\nPlease enter the action: ";
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if (!(cin >> action)) { ClearInput(cin); error("Error. Incorrect input"); }
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char ch;
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cin.get(ch);
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switch (action) {
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case CASE1: {
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cout << endl;
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cout << sp_2 << "Please enter a file name: ";
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string fileName;
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getline(cin, fileName);
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if (!cin) error("Error. Incorrect input");
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ifstream ifs{ fileName };
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if(!ifs) error("Error. File opening error");
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size_t lineNum = 0;
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cout << sp_4 << "[Format] Line number: line" << endl;
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while (true) {
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++lineNum;
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string s;
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getline(ifs, s);
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if (!ifs) {
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if (ifs.eof()) break;
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else error("Error. Read error");
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}
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if (IsDate(s)) {
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cout << sp_4 << lineNum << ": " << s << endl;
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}
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}
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cout << vsp_2;
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break;
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}
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case PRINTACTIONLIST:
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cout << actionList;
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break;
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case EXIT:
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cond = false;
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break;
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default:
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error("Error. Incorrect action number");
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break;
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}
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}
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catch (runtime_error& e) {
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cerr << e.what() << endl;
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}
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catch (...) {
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cerr << "Error. Exception\n";
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return 1;
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}
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return 0;
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}
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void ClearInput(istream& is)
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{
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is.clear();
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is.ignore(numeric_limits<streamsize>::max(), '\n');
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}
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bool IsDate(const string& s)
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{
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/* date pattern:
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dd/mm/yy OR dd/mm/yyyy OR dd-mm-yy OR dd-mm-yyyy OR dd.mm.yy OR dd.mm.yyyy OR
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mm/dd/yy OR mm/dd/yyyy OR mm-dd-yy OR mm-dd-yyyy OR mm.dd.yy OR mm.dd.yyyy OR
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yy/mm/dd OR yyyy/mm/dd OR yy-mm-dd OR yyyy-mm-dd OR yy.mm.dd OR yyyy.mm.dd OR
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yy/dd/mm OR yyyy/dd/mm OR yy-dd-mm OR yyyy-dd-mm OR yy.dd.mm OR yyyy.dd.mm
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*/
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string db{ R"((^|\s|$))" }; // date boundary
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string sep{ R"([./-])" }; // separator list
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string d{ R"((0?[1-9]|[12]\d|3[01]))" }; // day: D or DD
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string m{ R"((0?[1-9]|1[0-2]))" }; // month: M or MM
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string y{ R"(\d\d(\d\d)?)" }; // year: YY or YYYY
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regex pattern{
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db +
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'(' +
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'(' + d + sep + m + '|' + m + sep + d + ')' + sep + y
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+ '|' +
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y + sep + '(' + d + sep + m + '|' + m + sep + d + ')'
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+ ')'
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+ db
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};
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if (regex_search(s, pattern)) return true;
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return false;
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}

‎Chapter_23/C23_Exercise_23.6.h

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/* Exercise 23.6 */
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using namespace std;
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const char* sp_2 = " ";
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const char* sp_4 = " ";
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const char* sp_6 = " ";
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const char* sp_8 = " ";
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const char* vsp_2 = "\n\n";
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const char* vsp_3 = "\n\n\n";
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const char* vsp_4 = "\n\n\n\n";
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void ClearInput(istream& is);
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bool IsDate(const string& s);

‎Chapter_23/C23_Exercise_23.6_text.txt

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According to Merriam-Webster's Medical Dictionary, 21/12/2001
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pneumonoultramicroscopicsilicovolcanoconiosis 21/12/2001 is a
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21/12/2001 pneumoconiosis
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caused by inhalation 21/12/2001
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21/12/2001 of very fine silicate or quartz dust.
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23/12/2000
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23/12/2000 gfdgfd
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gfdgdfg 23/12/2000
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23/12/2000
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23/12/2000 dfsdf
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sdfsdf 23/12/2000
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01 true 2/22/90
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02 true 2/2/1990
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03 true 12/03/90
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04 true 12/23/2000
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05 true 23/12/2000
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06 true 03/12/2000
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07 true 3/12/20
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08 true 23/2/20
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09 true 23/02/2000
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10 true 23/12/2000
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11 true 2-29-1990
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12 true 29-2-1990
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13 true 1-1-00
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14 true 01-01-00
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15 true 31-01-00
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16 true 1-31-00
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17 true 28-02-2020
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18 true 31-10-2020
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19 true 10-31-2020
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20 true 31-12-2020
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21 true 02.29.00
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22 true 29.02.00
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23 true 1.1.00
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24 true 01.01.00
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25 true 31.01.2000
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26 true 1.31.2000
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27 true 28.02.2020
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28 true 31.10.2020
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29 true 10.31.2020
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30 true 31.12.2020
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31 true 90/2/22
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32 true 1990年2月2日
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33 true 90/12/03
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34 true 2000年12月23日
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35 true 20002312
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36 true 2000年03月12日
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37 true 20/3/12
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38 true 20/23/2
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39 true 20002302
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40 true 20002312
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41 true 1990-2-29
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42 true 1990-29-2
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43 true 00-1-1
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44 true 00-01-01
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45 true 00-31-01
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46 true 00-1-31
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47 true 2020-28-02
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48 true 2020-31-10
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49 true 2020年10月31日
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50 true 2020-31-12
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51 true 00.02.29
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52 true 00.29.02
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53 true 00.1.1
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54 true 00.01.01
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55 true 20003101
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56 true 2000年1月31日
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57 true 20202802
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58 true 20203110
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59 true 2020年10月31日
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60 true 20203112
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101 false 2/22/900
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102 false 22/22/1990
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103 false 13/13/90
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104 false 12/23/200
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105 false 23/12/200
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106 false 033/12/2000
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107 false 32/12/2000
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108 false 33/14/20
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109 false 00/2/2000
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110 false 23/0/20
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111 false 29-29-1990
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112 false 29-2-199
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113 false 0-1-00
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114 false 01-0-00
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115 false 32-01-00
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116 false 13-31-00
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117 false 28-22-2000
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118 false 32-10-2000
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119 false 13-31-2020
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120 false 31-12-20204
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121 false 02.29.000
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122 false 29.02.000
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123 false 13.13.00
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124 false 91.01.00
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125 false 31.21.2000
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126 false 1.32.2000
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127 false 28.22.2020
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128 false 31.10.202
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129 false 10.31.200
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130 false 111.12.2020
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131 false 900/2/22
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132 false 19902222
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133 false 90/13/13
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134 false 200/12/23
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135 false 200/23/12
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136 false 2000/033/12
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137 false 20003212
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138 false 20/33/14
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139 false 2000002
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140 false 20/23/0
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141 false 1990-29-29
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142 false 199-29-2
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143 false 00-0-1
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144 false 00-01-0
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145 false 00-32-01
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146 false 00-13-31
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147 false 2000-28-22-2000
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148 false 2000-32-10-2000
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149 false 202013-31-2020
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150 false 20204-31-12
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151 false 000.02.29
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152 false 000.29.02.000
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153 false 00.13.13.00
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154 false 00.91.01
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155 false 20003121
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156 false 2000132
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157 false 20202822.2020
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158 false 20203110.202
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159 false 200.10.31
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160 false 2020.111.12
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