Clear the Screen in C++

OrganicX · 11-01-2002, 08:18 AM

Can anyone tell me how to clear the screen in C++ under Linux.

thanks

M3xican · 11-02-2002, 06:28 AM

U have to use the clear() function.
It should required the conio.h library.

crabboy · 11-02-2002, 10:59 PM

conio.h? Don't have that on my linux box.

Take a look at this thread that was around for a while. C++ provides nothing special to do this. The C code in the examples will work.

http://www.linuxquestions.org/questi...threadid=11857

OrganicX · 11-03-2002, 06:47 PM

#include<iomanip.h>
#include<unistd.h>

void main()
{
.
.
.
system("tput clear");
.
.
.
}

The function system("tput clear"); and the #include<unistd.h> library clear the screen, for anyone else interested.

gdrobson · 11-03-2002, 10:11 PM

Code:

#include <stdio.h>

// f fullscreen
// r replace line

int main(){
   printf ("\f");
   printf ("asdf\n");
   return 0;
}

here you go

rao · 11-04-2002, 02:39 AM

Use clear() function. For this function use header #include<curses.h

jtshaw · 11-04-2002, 10:48 AM

be real careful using something line printf("\f"). If you pipe your console to a file it might not do what you expect.... you have to keep in mind you never know what printf is actually printing too (screen, printer, file, ect).

M3xican · 11-04-2002, 04:35 PM

I'm sorry...
the function is clrscr() and is provided by borland C++ (so the conio.h library).

The best way under Linux is using ncurses or system("clear");.

Mea culpa...

Slycordinator · 12-02-2002, 04:43 AM

Try this for size-

void clear_screen()
{
for(int i=0;i<23;i++)
{
cout << endl;
}
}

Unlike other clear_screens this is completely portable.

crabboy · 12-02-2002, 09:40 AM

What if your terminal has more than 24 rows? Then you go up to 50, 80, 100? Not the best solution...

Admiral Yoshi · 12-03-2002, 09:49 AM

it will start at the bottom too...

Slycordinator · 12-03-2002, 01:35 PM

void clear_screen()
{
#if defined(WIN_32)
system("cls")
#endif
#if defined(LINUX)
system("clear")
#endif
}

Should work I think; I'll try it and see.

Slycordinator · 12-03-2002, 02:10 PM

void clear()
{
#if defined(_WIN32)
system("cls");
#endif

#if defined(_linux)
system("clear");
#endif
}

does the same system call for clearing screen in linux also work in macs now that OS X is based on Unix? Because I do remember older macs having a different clear screen system call before.

priggle · 07-22-2003, 10:37 AM

You can clear the screen in C++ using the following code:

#include <iostream>

using namespace std;

int main(void)
{
cout << "\x1B[2J"; // Clear the screen
cout << "\x1B[0;0H"; // place cursor at home position
return 0;
}

DrOzz · 07-22-2003, 10:45 AM

just as easy to make a system call to the clear command..and make a function for it where all you would have to type is something like clrscr(); wherever you wanted to clear screen instead of typing it all over again.