lst-0027-book.cpp
#include <fstream>
#include <iostream>
using std::cout;
int main() {
std::ifstream file("data.dat");
if( !file ) { /* Error */ cout << "ERR\n"; return 1; }
std::ofstream filecopy("backup.dat");
if( !filecopy ) { /* Error */ cout << "ERR\n"; return 1; }
char ch;
while(file.get(ch) ) {
filecopy.put(ch);
}
}