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/