#include <stdio.h>
#include <conio.h>


void tracetriangle( int xOrg, int yOrg, int nHauteur, char cMotif, int fBaseEstEnBas )
{
	int nBase = (2 * nHauteur ) - 1;
	int nToDisplay = nBase;
	if( fBaseEstEnBas )
	{
		nToDisplay = 1;
	}

	for( int yLig = 0; yLig < nHauteur; yLig ++ )
	{
		int nFirst = (nBase/2) - (nToDisplay/2);
		int nLast =  (nBase/2) + (nToDisplay/2);
		for( int xCol = nFirst; xCol <= nLast; xCol ++ )
		{
			gotoxy( xOrg + xCol, yOrg + yLig );
			putchar( cMotif );
		}
		if( fBaseEstEnBas )
		{
			nToDisplay += 2;
		}
		else
		{
			nToDisplay -= 2;
		}
	}

}

void main()
{
	window(1,1,80,25);
	clrscr();
	tracetriangle( 1, 1, 10, '*', 1 );
	tracetriangle( 1, 11, 10, '*', 0 );
	getch();
}