Email Id validation in C++

Question

write a program in c++ to check email id is valid or not ?

Answer 1

bool Email(string email)
{
const regex pattern("(\\w+)(\\.|_)?(\\w*)@(\\w+)(\\.(\\w+))+");
return regex_match(email,pattern);
}

Explanation:
The \w group matches any character in any case any number of times. Then the \.|_ matches if a dot or underscore is present 0 or 1 times. Then \w again match n characters. Then @ matches the @ in the email. Then we again check for n characters and a '.' and a word after it, which must be present atleast one or more times.
For more info, see the python tutorial > regex expressions

Eg of emails that are matched :
[e-mail]
[e-mail]
[e-mail]
Etc.

You need to include <regex> header for this.

Answer 2

@Rema

#include<iostream>
#include<regex>
using namespace std;
bool Email(string email)
{
const regex pattern("(\\w+)(\\.|_)?(\\w*)@(\\w+)(\\.(\\w+))+");
return regex_match(email,pattern);
}
int main()
{
cout<<"Enter any E-Mail ID - "<<endl;
string str; getline(cin,str);
if(EMail(str))
cout<<"Yes, your E-Mail ID is valid!"<<endl;
else
cout<<"Sorry, Your E-Mail ID isn't valid."<<endl;
return 0;
}

Answer 3

You need to looking for "@", ".", and other especial caracters. You can use and array of chars with dinamic memory to get the string, and looking for with a for.

Answer 4

Why don't you do it yourself?

Answer 5

do{
email.checkValidation();
}while(email!=valid);

DONE

Answer 6

Wow... good you can copy and paste it.

Answer 7

I’m sorry but I couldn’t understand, please anyone write the code for me :( .