void setup()
{
	float somme, epsilon;
	int n;
	
	somme = 1;
	n = 2;
	
	do{
		epsilon = askFloat("Veuillez saisir la precision voulue [0.01;0.0001]");
	} while(!(0.01<=epsilon && epsilon<=0.0001));
	// epsilon<0.01 || epsilon>0.0001
	
	do
	{
		if(n%2==0)
		{
			s = s + 1/n;
		}
		else
		{
			s = s - 1/n;
		}
		n++;
	}
	while(1/n>=epsilon); 

	
}