Question

Very simplified version of my code:

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

int main () {
string name;

cout << "Enter first and last name" << endl;
getline(cin, name);

return 0;
}

As you can see I want my user to type in their first and last name which will include white spaces. I would like to check it for numeric characters and if any are entered, throw up an error. An example input could be: “J0hn Sm1th” which would of course display an error.

I know I will have to use isAlpha() and I can get it to work if just numbers or if just letters are entered, but not when they are combined.

Answer 1

#include <cstddef>
#include <string>

bool check_name(const string& str)
{
    for (std::size_t i = 0; i < str.size(); ++i)
        if (!((str[i]>='a' && str[i]<='z') ||
              (str[i]>='A' && str[i]<='Z') ||
               str[i]==' ' || str[i]=='-' ))
        return false;
    return true;
}