10-14.cpp

#include <iostream>
#include <fstream>
#include <cstdio>
#include <string>

int main( ) {

   char* pFileName = NULL;

   pFileName = tmpnam(NULL);
   // Right here is where another program may get the same temp
   // filename.

   if (!pFileName) {
      std::cerr << "Couldn't create temp file name.\n";
      return(EXIT_FAILURE);
   }

   std::cout << "The temp file name is: " << pFileName << '\n';

   std::ofstream of(pFileName);

   if (of) {
      of << "Here is some temp data.";
      of.close( );
   }

   std::ifstream ifs(pFileName);
   std::string s;
   
   if (ifs) {
      ifs >> s;
      std::cout << "Just read in \"" << s << "\"\n";
      ifs.close( );
   }
}