C++ Clearerr() Function














































C++ Clearerr() Function



DISCRIPTION

    The clearerr() function in C++ resets the error flags and the EOF indicator for the given file stream.

    Syntax :
void clearerr(FILE* stream);

   It is defined in <cstdio> header file.

  clearerr() Parameters

stream: The file stream to reset the error flags and EOF indicator.

 Return Value: None.

 Example: How clearerr() function works

#include <iostream>
#include <cstdio>

using namespace std;

int main ()
{
    int ch;
    FILE* fp;
    fp = fopen("file.txt","w");
    
    if(fp)
    {
        ch = getc(fp);
        if(ferror(fp))
        {
            cout << "Error set" << endl;
            clearerr (fp);
        }
    }
    if(!ferror(fp))
        cout << "Error reset";
    fclose (fp);
    return 0;
}

    When you run the program, the output will be:

Error set
Error reset

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