std::ferror

Defined in header `<cstdio>`
int ferror( std::FILE* stream );

Checks the given stream for errors.

Parameters

stream

the file stream to check

Return value

Nonzero value if the file stream has errors occurred, 0 otherwise.

Example

#include <cstdio>
#include <cstdlib>
 
int main()
{
    FILE* fp = std::fopen("test.txt", "r");
    if(!fp) {
        std::perror("File opening failed");
        return EXIT_FAILURE;
    }
 
    int c; // note: int, not char, required to handle EOF
    while ((c = std::fgetc(fp)) != EOF) { // standard C I/O file reading loop
       std::putchar(c);
    }
 
    if (std::ferror(fp))
        std::puts("I/O error when reading");
    else if (std::feof(fp))
        std::puts("End of file reached successfully");
 
    std::fclose(fp);
}

clearerr	clears errors (function)
feof	checks for the end-of-file (function)
perror	displays a character string corresponding of the current error to `stderr` (function)
C documentation for `ferror`

std::ferror

Parameters

Return value

Example

See also