std::ferror
From cppreference.com
Defined in header
<cstdio>
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int ferror( std::FILE* stream );
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Checks the given stream for errors.
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[edit] Parameters
stream | - | the file stream to check |
[edit] Return value
Nonzero value if the file stream has errors occurred, 0 otherwise
[edit] Example
Run this code
#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); }
[edit] See also
clears errors (function) |
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checks for the end-of-file (function) |
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displays a character string corresponding of the current error to stderr (function) |
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C documentation for ferror
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