lst-0022-book.cpp
// https://godbolt.org/z/o7YP7or8s
#include <fstream>
#include <iostream>
#include <string>
int main() {
std::string name = "textfile.txt";
std::ifstream file01;
file01.open(name);
if( file01.fail() ) {
std::cout << "Could not open " << name << "\n";
}
std::ofstream file02("data.dat");
if( file02.good() ) {
std::cout << "data.dat opened or created\n";
}
std::fstream file03;
file03.open("database.db");
if( !file03 ) {
std::cout << "Could not open database.db\n";
}
}