existing files

how do i use the 2 void function//
for instance for the 1st function i have to read and copy the contents of file01.dat and file02.dat into a 3rd file..
so can someone please help how to do the producers for the file I/O.. and also
i also wanted to know how in them  2nd function to read the merged file from data 3rd file.. so can someone please
show  me an example like this..
best2380Asked:
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kishore_joshiConnect With a Mentor Commented:
// to merg two files into the third file

void merg()
{
      char ch;
      ifstream f1("file01.dat"), f2("file02.dat");// two objects to read

      fstream d1;
                d1.open("file03.dat",ios::app);  // open in append mode
      
               do
      {
            f1.get(ch);
            d1<<ch;

      }while(ch != EOF);
             
               do
      {
            f2.get(ch);
            d1<<ch;

      }while(ch != EOF);

             d1.close(); // close the destination file.
}

/// to read the data that is merged
void merg_read()
{
              char ch;
              ifstream d1("file03.dat");// d1 objects to read data from file03
      
               do
      {
            f1.get(ch);
            cout<<ch;

      }while(ch != EOF);

}
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nietodCommented:
What do you mean by "use the 2 void function"?  That doesn't make sense?

>> 1st function i have to read and copy the
>> contents of file01.dat and file02.dat into a
>> 3rd file
Just use 3 fstream objects to open the 3 files.  Read all the information out of the fstream objects for file01 and file02 and write that information to file03.
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