Exam 12: Streams and File IO

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; }

cin is an output stream object of type ostream.

Assume you have opened and connected stream variables fileIn and fileOut.Assume further that you have finished with input file,but want to read the input file a second time.What is necessary to set the stream state to reread the file from the start? Explain.