std::fgetc
std::fgetc, std::getc
Defined in header <cstdio> | ||
|---|---|---|
int fgetc( std::FILE* stream ); int getc( std::FILE* stream ); |
Reads the next character from the given input stream.
Parameters
| stream | - | to read the character from |
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.
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);
}See also
|
(until C++14) | reads a character string from stdin (function) |
| writes a character to a file stream (function) |
|
| puts a character back into a file stream (function) |
|
C documentation for fgetc, getc |
|
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