Question

Create a program that reads in two strings separated by a whitespace, which are two valid email addresses. Your program should print True if both addresses map to the same email address and False otherwise. According to email:

-addresses are not case sensitive

dots don't matter,

-and any '+' before the '@' and all characters after the '+' and before the '@' are ignored

in C++ please

Answer 1

// do comment if any problem arises

//code

//answer has been highlighted

#include <iostream>

#include <cstring>

using namespace std;

// this function converts given string to lowercase

void lower(string &str)

{

    for (int i = 0; i < str.size(); i++)

        str[i] = tolower(str[i]);

}

// this function cleans email addresses

void clean(string &str)

{

    // convert to lowercase

    lower(str);

    // characters after + and @ are ignored

    bool flag = false;

    string temp = "";

    for (int i = 0; i < str.size(); i++)

    {

        if (str[i] == '+')

            flag = true;

        if (str[i] == '@')

            flag = false;

        if (!flag)

            temp += str[i];

    }

    str = temp;

}

int main(int argc, char const *argv[])

{

    string email1, email2;

    // read 2 strings

    cin >> email1 >> email2;

    // clean both addresses

    clean(email1);

    clean(email2);

    // print true if both are sam

    if (email1 == email2)

        cout << "True\n";

    else

        cout << "False\n";

    return 0;

}

Output: