What function can be used to detect when the end of an input file has been reached?

getc () or feof () in c/c++.

Explanation:

getc () returns EOF (End of File) when the end of the file reached is reached but it is not efficient because it also return EOF when it fails.

feof () returns non-zero value when the EOF is reached otherwise it return 0. So feof () is an efficient method to read a file.

For example:-

#include

int main ()

{

FILE * f = fopen ("sample. txt", "r");

int c = getc (f);

while (c! = EOF)

{

putchar (ch);

ch = getc (f);

}

if (feof (f))

printf ("/n File has ended.");

else

printf ("/n Reading not happened.");

fclose (f);

getchar ();

return 0;

}