ungetchar - Un-Get a character
ungetchar(file_descriptor, string)
ungetchar(file:file_descriptor,chars:string)
This function is used to pushes c back to stream, where it is available for subsequent read operations. Pushed-back characters will be returned in
reverse order; only one pushback is guaranteed.
ungetchar(ct, "c");
Written by Pierre Laplante, <laplante@sednove.com>
1.0 2015-12-28 21:24:14 laplante@sednove.com