Exercice 1:


    static void score (int a, int b, int c, int d){

	int p=0,q=0;
	if (c>=4) p++;
	if (d>=4) q++;
        if (a>b) {p+=4; if (a-b<8) q+=1;}
	else
        if (b>a) {q+=4; if (b-a<8) p+=1;}
	else {p+=2;q+=2;}
	System.out.println("A obtient " + p + " point(s)");
	System.out.println("B obtient " + q + " point(s)");
    }

Exercice 2:

a)

 static boolean estDiviseur (int a, int b){
	return (b%a==0);    }

b)

static boolean estDiviseur2 (int a, int b){
	while (a<b) {b=b-a;}    
    return(a==b);
}

c)

class Diviseur{
    static boolean estDiviseur (int a, int b){
	return (b%a==0);    }
    public static void main(String[] args){
	Scanner sc= new Scanner(System.in);
        int n;
        System.out.println("Entrer un nombre entier positif: ");
	n=sc.nextInt();
        System.out.println("Les diviseurs de "+n+ " sont: ");
        for (int i=1;i<n;i++) 
	    if (estDiviseur(i,n)) 
		System.out.print(" "+i+",");
System.out.println(" "+n+".");

    }
}


Exercice 3:

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