```/*************************************************************************************************************************************/
/*                                                                                                                                   */
/*        T E S T   D U   C A L C U L   D E S   M O M E N T S   D ' I N E R T I E  :                                                 */
/*                                                                                                                                   */
/*                                                                                                                                   */
/*        Author of '\$xtc/inertie.11\$c' :                                                                                            */
/*                                                                                                                                   */
/*                    Jean-Francois COLONNA (LACTAMME, 20230825171359).                                                              */
/*                                                                                                                                   */
/*************************************************************************************************************************************/

#include  <stdio.h>

#define   Xmin      (-20)
#define   Xmax      (+50)

#define   Ymin      (-40)
#define   Ymax      (+30)

int       main()
{
double    x,y;
double    n=0;
double    xG=0,yG=0;
double    Ixx=0,Ixy=0,Iyx=0,Iyy=0;

for       (y=Ymin ; y<=Ymax ; y++)
{
for       (x=Xmin ; x<=Xmax ; x++)
{
n++;
xG = xG+x;
yG = yG+y;
}
}

xG = xG/n;
yG = yG/n;

for       (y=Ymin ; y<=Ymax ; y++)
{
for       (x=Xmin ; x<=Xmax ; x++)
{
Ixx = (x-xG)*(x-xG);
Ixy = (x-xG)*(y-yG);
Iyx = (y-yG)*(x-xG);
Iyy = (y-yG)*(y-yG);
}
}

if        (Ixy != Iyx)
{
fprintf(stderr,"Les moments d'inertie 'Ixy=%+f' et 'Iyx=%+f' sont differents.\n",Ixy,Iyx);
}
else
{
}

printf("NombrePoints=%d\n",(int)n);
printf("MatriceInertie={{%+f,%+f},{%+f,%+f}}\n",Ixx,Ixy,Iyx,Iyy);
}
```