C++ programmazione file?

[menphisx]

#include <iostream>

#define LINE_SIZE 20

int main(){

   char saluto[LINE_SIZE];
   std::ifstream input("file.txt", std::ifstream::in);

   input.getline(saluto, LINE_SIZE);

   std::cout << saluto << std::endl:

   input.close();

   return 0;

}