#include <stdio.h> #include <string.h> #include <ctype.h> int main() { char text[] = "Room 42"; int letters = 0; int digits = 0; int i; for (i = 0; i < strlen(text); i++) { if (isalpha(text[i])) { letters++; } else if (isdigit(text[i])) { digits++; } } printf("Letters: %d\n", letters); printf("Digits: %d\n", digits); return 0; }