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std::fgetc, std::getc

From cppreference.com
< cpp‎ | io‎ | c
 
 
 
 
Defined in header <cstdio>
int fgetc( std::FILE* stream );
int getc( std::FILE* stream );

Reads the next character from the given input stream.

Contents

[edit] Parameters

stream - to read the character from

[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

#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");
}


[edit] See also

(until C++14)
reads a character string from stdin
(function) [edit]
writes a character to a file stream
(function) [edit]
puts a character back into a file stream
(function) [edit]
C documentation for fgetc, getc