Question

How to check file status in C++

Answer 1

#include <iostream>
#include <fstream>

using std::cout;
using std::endl;
using std::ifstream;

void check_file_status(ifstream &ifs)
{
	std::ios::iostate state;

	state = ifs.rdstate();

	if (state & std::ios::eofbit)
		cout << endl << "EOF" << endl;
	else if (state & std::ios::failbit)
		cout << endl << "Non-Fatal I/O error" << endl;
	else if (state &std::ios::badbit)
		cout << endl << "Fatal I/O error" << endl;
}

int main()
{
	ifstream ifs("d:\\data.txt");

	if (!ifs) {
		cout << "Error open file" << endl;
		return 1;
	}

	char ch;
	while (ifs.get(ch)) {
		cout << ch;
		check_file_status(ifs);
	}

	check_file_status(ifs);  
	ifs.close();

	return 0;
}


/*
run:

c c++ java
EOF

*/

 

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