#include <iostream> #include <cstring> 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)); // write your code here...... for (int i = 0; buf[i] !='\0'; i++) { char c = buf[i]; if(c >= 'a' &...