How to perform data validation for emails with C++?

[carolinefox]

I have this big project and I need to do data validation for an email. I have googled several stuff but I always get something so not in the topic.

[johny10151981]

try this link

[Sherin]

Try This Code

#include <bits/stdc++.h> 
using namespace std; 

bool isChar(char c) 
{ 
	return ((c >= 'a' && c <= 'z') 
			|| (c >= 'A' && c <= 'Z')); 
} 

bool isDigit(const char c) 
{ 
	return (c >= '0' && c <= '9'); 
} 

bool is_valid(string email) 
{ 
	
	if (!isChar(email[0])) { 

		return 0; 
	} 
	
	int At = -1, Dot = -1; 

	for (int i = 0; 
		i < email.length(); i++) { 

		
		if (email[i] == '@') { 

			At = i; 
		} 

		else if (email[i] == '.') { 

			Dot = i; 
		} 
	} 

	if (At == -1 || Dot == -1) 
		return 0; 

	if (At > Dot) 
		return 0; 

	return !(Dot >= (email.length() - 1)); 
} 

int main() 
{ 
	string email = "contribute@geeksforgeeks.org"; 

	bool ans = is_valid(email); 

	if (ans) { 
		cout << email << " : "
			<< "valid" << endl; 
	} 
	else { 
		cout << email << " : "
			<< "invalid" << endl; 
	} 

	return 0; 
}