std::fgetc, std::getc - cppreference.com (original) (raw)

C++

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Input/output library

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C-style I/O

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| Defined in header | | | | ------------------------------------------------------------------------------------------ | | | | int fgetc( std::FILE* stream ); int getc( std::FILE* stream ); | | |

Reads the next character from the given input stream.

Contents

• 1 Parameters
• 2 Return value
• 3 Example
• 4 See also

[edit] Parameters

[edit] Return value

The obtained character on success or EOF on failure.

If the failure has been caused by end of file condition, additionally sets the eof indicator (see std::feof()) on stream. If the failure has been caused by some other error, sets the error indicator (see std::ferror()) on stream.

[edit] Example

Run this code

#include #include   int main() { int is_ok = EXIT_FAILURE; FILE* fp = std::fopen("/tmp/test.txt", "w+"); if (!fp) { std::perror("File opening failed"); return is_ok; }   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"); is_ok = EXIT_SUCCESS; }   std::fclose(fp); return is_ok; }

Output:

End of file reached successfully

[edit] See also