1: //simple_regex_example_boost.cpp
2: //Validating simple user input with regular expressions.
4: #include <iostream>
5: #include <string>
6: using namespace std;
8: #include "boost/regex.hpp"
9: using boost::regex;
10: using boost::regex_match;
12: int main()
13: {
14: //Get a valid Canadian postal code from the user
15: cout << "\nEnter a Canadian postal code: ";
16: string data;
17: getline(cin, data);
18: while (!regex_match(data, regex("[A-Z]\\d[A-Z] \\d[A-Z]\\d")))
19: {
20: cout << "\nThat was an invalid postal code.";
21: cout << "\nPlease enter another one: ";
22: getline(cin, data);
23: }
24: cout << "\nThat was a valid postal code. Thank you!";
25: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
27: //Get a valid 10-digit phone number from the user
28: cout << "\nEnter a 10-digit phone number (xxx-xxx-xxxx): ";
29: getline(cin, data);
30: while (!regex_match(data, regex("[1-9]\\d{2}-[1-9]\\d{2}-\\d{4}")))
31: {
32: cout << "\nThat was an invalid phone number.";
33: cout << "\nPlease enter another one: ";
34: getline(cin, data);
35: }
36: cout << "\nThat was a valid phone number. Thank you!";
37: cout << "\nPress Enter to continue ... "; cin.ignore(80, '\n');
38: }