C / C++ / MFC

#include <stdio.h>

int main ()
{
  FILE * pFile;
  char buffer[] = { 'x' , 'y' , 'z' };
  pFile = fopen ( "myfile.bin" , "wb" );
  fwrite (buffer , sizeof(buffer[0]) , sizeof(buffer) , pFile );
  fclose (pFile);
  return 0;
}

( Web-Example )

tunminster wrote:

...output file by MFC application. How can I do it ?

#include <string>
#include <iostream>
#include <fstream>
#include <iomanip> //for setw()
#include <cstdlib> //for exit()

int main() {

std::string FileName = "C:/temp/file.out";

std::ofstream file(FileName.c_str());

//file open?
if( !file)  {
  //No: Abort
  std::cerr << "Error opening file " << FileName << std::endl;
  exit( EXIT_FAILURE); // no need to close - file was never opened
}

const int i = 56; //arbitrary
const double j = 56.0003;

//Write to file
file << "Some play with Numbers \n";
file << std::setw(3) << i << " " << std::setw(2) << i << "\n";
file << std::setw(7) << j << " " << std::setw(4) << j << std::endl;

} //closes file automatically