#include <iostream>
#include <string>

bool check_extention (const std::string& filename)
{
  const char* ext = ".cpp";
  return !strcmp(filename.c_str() + filename.length() - strlen(ext), ext);
}


int main()
{
  std::cerr << check_extention("hoge.cpp") << std::endl;
  std::cerr << check_extention("hoge.c") << std::endl;
  return 0;
}