Please explain the difference b 1

[teser]

Please explain the difference between [tt]ifstream[/tt] and [tt]ofstream[/tt].

What do they each do?

 

[michaelkrauklis]

ifstream is for file input, and ofstream is for file output(in file stream and out file stream respectively). They allow you to read and write from files.

ifstream in(filename_in, ios::in);
ofstream out(filename_out, ios::out);
if(!in||!out){
  cerr<<&quot;error: input or output&quot;;
  exit(1);
}
char ch[100];
while(in.getline(ch,100)){
  out<<ch<<endl;
}
in.close();
out.close();

There's a quick example of a segment of code that will copy a file from [filename_in] to [filename_out]. I hope that helped.

p.s. The destructors for ifstream and ofstream automaticaly close the stream, so in.close() and out.close() are a bit redundant, but it's good programming practice to close your streams. There are some cases where data can be lost if you don't. MYenigmaSELF:-9
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