ios bad() function in C++ with Examples

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

bool bad() const;

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

Time Complexity: O(1)

Auxiliary Space: O(1)

Example 1:

CPP

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

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

int main()
{

    // Stream
    stringstream ss;

    // Using bad() function
    bool isBad = ss.bad();

    // print result
    cout << "is stream bad: "
        << isBad << endl;

    return 0;
}

Output:

is stream bad: 0

Example 2:

CPP

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

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

int main()
{

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

    // Using bad() function
    bool isBad = ss.bad();

    // print result
    cout << "is stream bad: "
        << isBad << endl;

    return 0;
}

Output:

is stream bad: 1

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