c++ioiostreamundoungetc

Is there a C++ version of ungetc?

Is there a C++ version of ungetc?

That is, can I put a character back onto an istream?

Solution

  • Yes. istream::putback is the same as ungetc except if using unget():

    You can't lie with unget(). It "ungets" the last-read character. You can lie with putback(c). You can "putback" some character other than the last-read character. Sometimes putting back a character other than the last-read character can be useful.

    Also, if the underlying read buffer really does have buffering capability, you can "putback" more than one character. I think ungetc() is limited to one character.