In DOS, I want to allow someone to be able to enter input while seeing output at the same time, is this possible, I heard this is what we call "multi-tasking". Please help.
Here's an instance of what i mean:
#include <iostream.h>
int main ()
{
char input;
while (1)
{
cout << "Output!\n"; // output
}
while (1)
{
cin >> input; // input
}
return 0;
}
See, I want to be able to do two things at once, can someon help please?
Hi,
have a look at the _beginthread () function.
Greetings
cody
#include "reallife.h"
I think this will be tricky in DOS - it's not an operating system which makes multitasking easy (unless you count things like TSRs)
Or do you mean a win32 console program, and just called it DOS because it has a command line?
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Yeah, sorry about that, I mean the Win32 console. Will that "_beginthread" thing work with MSVC++ ?
Yes, it works like this (you need to link with the multithreaded libraries) -
Code:#include <iostream> #include <process.h> #include <windows.h> using namespace std; void fn(void* dummy) { while(1) { cout << "Output" << flush; Sleep(3000); } } void fn2(void* dummy) { char input; while(1) { cin >> input; cout << input << flush; } } using namespace std; int main() { _beginthread(fn,0,0); _beginthread(fn2,0,0); while(1); return 0; }
zen
I've just tried your example and have used the following libraries:
LIBCMT.LIB
MSVCRT.LIB
Yet it gives me the following error:
error : '_beginthread' : undeclared identifier
???
_beginthread() also needs _MT to be defined. You don't need to do all this manually, go to Project/Settings, C/C++ tab, Code Generation category and change the Run-Time library type to one of the Multithreaded types (depending on your build type and preference).
zen
k, that works, thanks.
