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.

Example 1:

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// 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;
}

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Output:

is stream bad: 0

Example 2:

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// 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;
}

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Output:

is stream bad: 1

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



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