ios eof() function in C++ with Examples (original) (raw)

Last Updated : 12 Jul, 2025

The eof() method of ios class in C++ is used to check if the stream is has raised any EOF (End Of File) error. It means that this function will check if this stream has its eofbit set. Syntax:

bool eof() const;

Parameters: This method does not accept any parameter. Return Value: This method returns true if the stream has eofbit set, else false.

Time Complexity: O(1)

Auxiliary Space: O(1)

Example 1:

CPP `

// C++ code to demonstrate // the working of eof() function

#include <bits/stdc++.h> using namespace std;

int main() {

// Stream
stringstream ss;

// Using eof() function
bool isEOF = ss.eof();

// print result
cout << "is stream eof: "
    << isEOF << endl;

return 0;

}

`

Example 2:

CPP `

// C++ code to demonstrate // the working of eof() function

#include <bits/stdc++.h> using namespace std;

int main() {

// Stream
stringstream ss;
ss.clear(ss.eofbit);

// Using eof() function
bool isEOF = ss.eof();

// print result
cout << "is stream eof: "
    << isEOF << endl;

return 0;

}

`