nhu.cpp

#include <iostream>
#include <fstream>
#include <vector>
#include <ctype.h>

using namespace std;

int main() {
  ifstream in_file("mauthu1.txt");

  vector<string> chus;

  if (in_file.is_open()) {
    string temp;
    while (!in_file.eof()) {
      in_file >> temp;
      chus.push_back(temp);
    }
    in_file.close();
  }

  ofstream out_file("mauthu2.txt");

  if (out_file.is_open()) {
      for (vector<string>::size_type i = 0; i < chus.size(); i++) {
        chus[i][0] = toupper(chus[i][0]);
        out_file << chus[i] << " ";
      }
      out_file << endl;
      out_file.close();
  }
}