void OuiNon(int *valide)
{
	char reponse;
	do{
		reponse = getch();
		if(reponse != 'o' && reponse != 'n')
			printf("Veuillez repondre par 'o' ou 'n'.\n");
		else if(reponse == 'n')
			*valide = 0;
		else if(reponse == 'o')
			*valide = 1;
	}while(reponse != 'o' && reponse != 'n');
	printf("\n");
}