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25 Years of Programming
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Borland C++ functions for MSDOS or EasyWin programsThis three-function subset of my Borland C++ 4.0 function library is for console interfaces (MSDOS or EasyWin), not for Windows GUI. One or more are declared, possibly with default parameters, in my.h. There are also versions of these functions for Microsoft Visual C++. A note about EasyWin - it is only for static-linked programs: The Borland C++ 4.0 User's Guide, page 407, says that you can also initialize and use an EasyWin text-based console interface in a "true" Windows (e.g. ObjectWindows / OWL) program. I tried on and off for nearly two years to make this work, spending many days trying to track down what was missing. It turned out to be simple (arrgh!): to use EasyWin, your project must be static linked. The EasyWin code is only in the static link libraries. |
/* yesno.cpp 12-2-96
Copyright (C)1996 Steven Whitney.
Published under GNU GPL (General Public License) Version 3, with ABSOLUTELY NO WARRANTY.
Asks user a yes/no question, using either cout or a provided constream.
returns TRUE if the answer is yes, FALSE if no.
prompt is a string, not a string&, so it can have a default value (see my.h)
*/
#include <conio.h>
#include "c:\bcs\my.h"
BOOL yesno(string prompt, ostream& os)
{
int ch;
os << endl;
do
{
os << prompt << " (y/n)? ";
ch = tolower(getche());
os << endl;
}
while((ch != 'y') && (ch != 'n'));
return(ch == 'y');
}
/* presskey.cpp 12-19-96
Copyright (C)1996 Steven Whitney.
Published under GNU GPL (General Public License) Version 3, with ABSOLUTELY NO WARRANTY.
says press any key to continue, and waits for a key. erases its message
to leave a cleaner screen, but moves to new line anyway so that
if echoed to printer with ^P, subsequent text won't overwrite.
The default os is cout, but can be, for example, a constream.
12-2-99 returns the char you pressed so it can be used.
*/
#include <stdio.h>
#include <conio.h>
#include "c:\bcs\my.h"
int presskey(ostream& os)
{
os << "Press any key to continue...";
int ch = getch();
os << "\r " << endl;
return(ch);
}
/* aborts.cpp 10-31-96
Copyright (C)1996 Steven Whitney.
Published under GNU GPL (General Public License) Version 3, with ABSOLUTELY NO WARRANTY.
prints a specified error message and aborts program execution
"plain" version. see graborts() for version that calls closegraph().
Advantage of this over BC4 abort() is that this will cause destructors
to be called for all objects, while abort() calls NO destructors, not
even for globals (PG:147). Any open fstreams are closed by their destructors.
*/
#include <stdio.h>
#include <stdlib.h>
#include "c:\bcs\my.h"
void aborts(const string& s)
{
cerr << endl << s << endl;
presskey(); // prevent msg scrolling off before being seen
exit(1);
}
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