how to test a string for letters only

Question

how could I test a string against only valid characters like letters a-z?...

string name;

cout << \"Enter your name\"
cin >> name;

string lette         


        

Answer 1

I would suggest investigating the ctype library: http://www.cplusplus.com/reference/std/locale/ctype/

For example, the function is (see ctype.is) is a way to check properties on letters in locale sensitive manner:

#include 
using namespace std;
bool is_alpha(char c) {
    locale loc;
    bool upper = use_facet< ctype >(loc).is( ctype::alpha, quote[0]);
    return upper;
}