ios rdstate() function in C++ with Examples

The rdstate() method of ios class in C++ is used to read the internal state of this stream.

Syntax:

iostate rdstate() const;

Parameters: This method does not accept any parameter.

Return Value: This method returns the current internal state of this stream.

Example 1:

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

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

int main()
{

    // Stream
    stringstream ss;

    // Using rdstate() function
    cout << "stream rdstate: "
         << ss.rdstate() << endl;

    return 0;
}

Output:

stream rdstate: 0

Example 2:

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

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

int main()
{

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

    // Using rdstate() function
    cout << "stream rdstate: "
         << ss.rdstate() << endl;

    return 0;
}

Output:

stream rdstate: 4

Reference: hhttp://www.cplusplus.com/reference/ios/ios/rdstate/