#include <iostream>
#include <conio.h>
using namespace std;
void main() {
    setlocale(LC_ALL, "ru");
    const int a = 100;
    char str1[a];
    cout << "Введiть стрiчку : ";
    gets_s(str1);
    int bukv = 0, b = 0;
    for (int i = 0; str1 != 0; i++) {
        b = isalpha(str1[i]);
        if (b != 0) {
            bukv++;
        }
    }
    cout << "\n";
    cout << bukv;
    cout << "\n";
    system("pause");
}