Open In App

ios fail() function in C++ with Examples

Improve
Improve
Like Article
Like
Save
Share
Report

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

Syntax:

bool fail() const;

Parameters: This method does not accept any parameter.

Return Value: This method returns true if the stream has failbit set, else false.

Example 1:




// C++ code to demonstrate
// the working of fail() function
  
#include <bits/stdc++.h>
using namespace std;
  
int main()
{
  
    // Stream
    stringstream ss;
  
    // Using fail() function
    bool isFail = ss.fail();
  
    // print result
    cout << "is stream fail: "
         << isFail << endl;
  
    return 0;
}


Output:

is stream fail: 0

Example 2:




// C++ code to demonstrate
// the working of fail() function
  
#include <bits/stdc++.h>
using namespace std;
  
int main()
{
  
    // Stream
    stringstream ss;
    ss.clear(ss.failbit);
  
    // Using fail() function
    bool isFail = ss.fail();
  
    // print result
    cout << "is stream fail: "
         << isFail << endl;
  
    return 0;
}


Output:

is stream fail: 1

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



Last Updated : 02 Sep, 2019
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads