lst-0028-book.cpp
// https://godbolt.org/z/hPaz3a3sE
#include <fstream>
#include <iostream>
using std::cout;
int main() {
std::ifstream file("44fstream07.cpp");
if( !file ) { /* Error */ cout << "ERR\n"; return 1; }
std::ofstream filecopy("backup.cpp");
if( !filecopy ) { /* Error */ cout << "ERR\n"; return 1; }
std::string buffer;
while( getline(file, buffer) ) {
filecopy << buffer << std::endl;
cout << buffer << std::endl;
}
if( file.eof() ) {
file.clear();
}
}