Input Number Letter Special

#include <iostream>
using namespace std;
int main(){
    char input;
    cout << "Enter a Character: ";
    cin >> input;
    if (isdigit(input))
        cout << input << " is a number.";
    else if (isalpha(input))
        cout << input << " is a letter.";
    else
        cout << input << " is a special character.";
}