Given the Following Code

Given the following code.The input file,in.dat,is a copy of the program code in this problem.How will the output file,out.dat,differ from the input file?
// file: testQuestion.cc
// test question: copy files: in.dat to out.dat
// in.dat is a copy of a file containing this code.
// use EOF to terminate copy loop
#include <fstream>
#include <cstdlib> // for exit()
using namespace std;
int main()
{
ifstream in;
ofstream out;
in.open("in.dat");
out.open("out.dat");
while(in >> ch)
out << ch;
return 0;
}