Recover stdin from eof in C

Question

I use the C code below to read data input from a terminal. If the user enters EOF, for example. by pressing ^ C, stdin closes and subsequent attempts to read from it, for example. via getchar () or scanf (), will throw an exception.

Is there anything I can do in C to “restore” my program, in the sense that if some user accidentally enters EOF, it will be ignored, so I can read from stdin again?

#include <stdio.h>

int main(void)
{
    int res_getchar=getchar();
    getchar();
    return 0;
}

Answer 1

Using ungetc()to return a character, you can clear the EOF indicator for a stream.

C99 §7.19.7.11 Function ungetc

 int ungetc(int c, FILE *stream);

ungetc . , , .

Answer 2

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• clearerr C , , EOF FILE ; , C read , EOF , .

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• POSIX- (.. " Windows" ) cfmakeraw, ^D EOF.

  , ; , , . readline (GPL) editline (BSD). - , , .

Answer 3

, . EOF, stdin.

, , stdin , .. , , stdin - .