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C++ Regex 邮箱校验

第七根弦 2015 年 2 月 13 日 UC, Visual Studio 发表评论 (0)

C++ Regex 邮箱校验

C++
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#include <regex>
#include <iostream>
#include <string>
 
bool is_email_valid(const std::string& email)
{
   // define a regular expression
   const std::tr1::regex pattern
      ("(\\w+)(\\.|_)?(\\w*)@(\\w+)(\\.(\\w+))+");
 
   // try to match the string with the regular expression
   return std::tr1::regex_match(email, pattern);
}
 
int main()
{
   std::string email1 = "[email protected]";
   std::string email2 = "[email protected]";
   std::string email3 = "[email protected]";
   std::string email4 = "marius@domain";
 
   std::cout << email1 << " : " << (is_email_valid(email1) ?
      "valid" : "invalid") << std::endl;
   std::cout << email2 << " : " << (is_email_valid(email2) ?
      "valid" : "invalid") << std::endl;
   std::cout << email3 << " : " << (is_email_valid(email3) ?
     "valid" : "invalid") << std::endl;
   std::cout << email4 << " : " << (is_email_valid(email4) ?
     "valid" : "invalid") << std::endl;
 
   return 0;
}

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