#include <iostream> #include <bits/stdc++.h> using namespace std; int main() { int letter = 0; int digit = 0; int space =0; int other =0; char buf[1024] ={0}; cin.getline(buf, sizeof(buf)); for(int i = 0; buf[i] !='\0';i++){ char c = buf[i]; if(c >='a' && c <= 'z' || c>='A' && c <='Z'){ letter++; } else if (c >='0' && c <='9'){ digit++; } else if (c ==' '){ space++; }else{ other ++; } } cout << "letter:" << letter << " digit:" << digit << " space:" << space << " other:" << other << endl; return 0; }