Clear Screen Command in C++ - c++

Question

I want to clear the screen after user enters some numbers in C++. I'm programming in console application mode.
so how to do it? My OS is win7 and My IDE is CodeBlocks and the Compiler is MingW...

Answer 1

It depends of your OS,
If you use linux:
system("clear");
If you use windows:
system("cls");
but this make your application lees portable, it's preferable to do
cout << string(50, '\n');
this line will print lines to seem like the terminal was 'cleared'.
A good article about that problem:
http://www.cplusplus.com/articles/4z18T05o/

Answer 2

You can use the clrscr() defined in conio.h.
Ways to clear screen the output screen.

Answer 3

you can try system methods E.g. system("CLS");

Answer 4

link the conio.h in your compiler. I forgot how to do that. if you will use clear screen repeatedly put this function.
enter code here
void clrscr()
{
system("cls");
}

Answer 5

That's what Microsoft has to say about clearing a console:
#include <windows.h>
void cls( HANDLE hConsole )
{
COORD coordScreen = { 0, 0 }; // home for the cursor
DWORD cCharsWritten;
CONSOLE_SCREEN_BUFFER_INFO csbi;
DWORD dwConSize;
// Get the number of character cells in the current buffer.
if( !GetConsoleScreenBufferInfo( hConsole, &csbi ))
{
return;
}
dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
// Fill the entire screen with blanks.
if( !FillConsoleOutputCharacter( hConsole, // Handle to console screen buffer
(TCHAR) ' ', // Character to write to the buffer
dwConSize, // Number of cells to write
coordScreen, // Coordinates of first cell
&cCharsWritten ))// Receive number of characters written
{
return;
}
// Get the current text attribute.
if( !GetConsoleScreenBufferInfo( hConsole, &csbi ))
{
return;
}
// Set the buffer's attributes accordingly.
if( !FillConsoleOutputAttribute( hConsole, // Handle to console screen buffer
csbi.wAttributes, // Character attributes to use
dwConSize, // Number of cells to set attribute
coordScreen, // Coordinates of first cell
&cCharsWritten )) // Receive number of characters written
{
return;
}
// Put the cursor at its home coordinates.
SetConsoleCursorPosition( hConsole, coordScreen );
}
int main()
{
HANDLE hStdout;
hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
cls(hStdout);
return 0;
}

Answer 6

system("cls");
Brilliant. So what happens if I replace the Windows cls with my own malicious cls? You've just given me control, thanks! This is what's called a back door, and you left it wide open by using an insecure technique.
Source: http://www.daniweb.com/software-development/cpp/threads/76934/how-do-i-clear-my-screen-in-c.

Answer 7

One method is to output '\f' (corresponding to the ASCII form feed character, code 12, which is used by line printers to eject a page, and recognized by some common terminals and emulators as a clear screen).
That won't work on Windows.
#ifdef _WIN32
/* windows hack */
#else
std::cout << '\f' std::flush;
#endif