PS8Q6.cpp

#include <iostream>
#include <cctype>
using namespace std;

bool validate(string name)
{
    bool flag = true;
    for(int sub = 0; sub < name.length(); sub++)
    {
        if(!isalpha(name[sub]))
        {
            cout << "Your name cannot contain: " << name[sub] << endl;
            flag = false;
        }
    }
    return flag;
}

int main()
{
    string input;
    cout << "What's your first name?\n";
    cin >> input;

    if (validate(input))
    {
        cout << "Valid name.\n";
    }
    else
        cout << "Invalid name.\n";


}