#include <iostream>
using namespace std;

char email[20];
string output;
int index;

int main()

{
    index=0;
    cout<<"please enter and email address : ";
    cin>>email;

    while(email[index]!='@')
    {
        
        
        
        cout<<email[index];
        index++;

    }
    cout<<endl;

    return 0;
}

#include <iostream>
using namespace std;

char email[20];
char output[20];
int index;

int main()

{
    index=0;
    cout<<"please enter and email address : ";
    cin>>email;

    while(email[index]!='@')
    {
        
        output[index]=email[index];
        index++;

    }
    
    output[index]='\0';
    cout<<"Email Address Before @ sign is "<<output<<endl;






    return 0;
}