#include <iostream>
#include <fstream>
#include <cstdlib>

int main() {
  std::cout<<"File Ofstream Testing "<<std::endl;

  const char * file_name = "Test_File.bin";
  int ONE = 1;
  int ZERO = 0;

  int ONE_TWENTY = 120;
  int TWO_TWENTY = 220;

  int THREE_TWENTY_THREE = 323;
  int THREE_FORTY_FIVE = 345;

//---------------------------------------------------------------------------
{
 std::ofstream file_write(file_name, std::ios::out|std::ios::binary);

 if(!(file_write.is_open())) {
    std::cout<<"File cannot be opened "<<std::endl;
    exit(0);
 }

 file_write.seekp(0);
 file_write.write((char *)&ONE,sizeof(int));
 file_write.write((char *)&ONE_TWENTY,sizeof(int));
 file_write.write((char *)&THREE_TWENTY_THREE,sizeof(int));

 file_write.close();
}
//---------------------------------------------------------------------------
{
 std::ifstream file_read(file_name,std::ios::in|std::ios::binary);

 if(!(file_read.is_open())) {
        std::cout<<"File cannot be opened "<<std::endl;
        exit(0);
 }

 int temp;
 file_read.seekg(0);
 file_read.read((char *)&temp,sizeof(int));
 std::cout<<"Temp "<<temp<<std::endl;
 file_read.read((char *)&temp,sizeof(int));
 std::cout<<"Temp "<<temp<<std::endl;
 file_read.read((char *)&temp,sizeof(int));
 std::cout<<"Temp "<<temp<<std::endl;

 file_read.close();
}
  //---------------------------------------------------------------------------
{
  std::fstream file_write(file_name, std::ios::in | std::ios::out | std::ios::binary);

  if(!(file_write.is_open())) {
   std::cout<<"File cannot be opened "<<std::endl;
   exit(0);
 }

 file_write.seekp(sizeof(int), std::ios::beg);
 file_write.write((char *)&TWO_TWENTY,sizeof(int));
 file_write.seekp(sizeof(int) + sizeof(int));
 file_write.write((char *)&THREE_FORTY_FIVE,sizeof(int));

 file_write.close();
}
//--------------------------------------------------------------------------
{
  std::ifstream file_read(file_name,std::ios::in|std::ios::binary);

  if(!(file_read.is_open())) {
    std::cout<<"File cannot be opened "<<std::endl;
    exit(0);
  }

  int temp;
  file_read.seekg(0);
  file_read.read((char *)&temp,sizeof(int));
  std::cout<<"Temp "<<temp<<std::endl;
  file_read.seekg(sizeof(int));
  file_read.read((char *)&temp,sizeof(int));
  std::cout<<"Temp "<<temp<<std::endl;
  file_read.seekg(sizeof(int) + sizeof(int));
  file_read.read((char *)&temp,sizeof(int));
  std::cout<<"Temp "<<temp<<std::endl;

   file_read.close();
 }
 //--------------------------------------------------------------------------------
 return 0;
}//fn:main