// Exercice 2

import java.util.Scanner;

class Age {

	public static void main(String[] args) {
		int actuel, naissance, age, agemin;
		Scanner sc = new Scanner(System.in);
		System.out.print("annee actuelle ? ");
		actuel = sc.nextInt();
		System.out.print("annee de naissance ?");
		naissance = sc.nextInt();
		age = actuel - naissance;
		agemin = age - 1;
		System.out.print("Si votre anniversaire est deja passe, vous avez " + age);
		System.out.print(" ans, sinon, vous en avez " + agemin);
		System.out.print(".");
	}
}

// Exercice 3

import java.util.Scanner;

class Lettre {
	public static void main(String[] args) {
		String charge1, charge2, etudiant;
		Scanner sc = new Scanner(System.in);
		System.out.print("Nom du 1er charge de TP ? ");
		charge1 = sc.next();
		System.out.print("Nom du 1er charge de TP ? ");
		charge2 = sc.next();
		System.out.print("Nom de l'etudiant ? ");
		etudiant = sc.next();
		System.out.print("Chers " + charge1);
		System.out.print(" et " + charge2);
		System.out.println(",");
		System.out.println("J'adore vos TPs, ils sont tellement \"bien\" !");
		System.out.print("Signé " + etudiant);
		System.out.print(".");
	}
}

// Exercice 4

class ExprArith {
    public static void main(String[] args) {
	System.out.println("4 / 3 = " + 4/3);
	System.out.println("4 / 3.0 = " + 4/3.0);
    	System.out.println("4 - 3 * 5 = " + (4 - 3 * 5));
	System.out.println("4 - (3 * 5) = " + (4 - (3 * 5)));
    	System.out.println("(4 - 3) * 5 = " + ((4 - 3) * 5));
	System.out.println("117 % 7 = " + 117 % 7);
    	System.out.println("0.3 - 0.2 = " + (0.3 - 0.2));
	System.out.println("0.2 - 0.1 = " + (0.2 - 0.1));
    	System.out.println("1.3 / 0 = " + 1.3 / 0);
	System.out.println("2 / 0 = " + 2 / 0);
    	System.out.println("( - 1.3) / 0 = " + ( - 1.3) / 0);
	System.out.println("0 / 1.3 = " + 0 / 1.3);
     	System.out.println("0 / 0 = " + 0 / 0);
  }
}

// Exercice 5

import java.util.Scanner;

public class Moyenne {
	public static void main(String[] args) {
		double somme, moyenne;
		somme = (double) 0.0 ;
		Scanner sc = new Scanner(System.in);
		System.out.println("Entrez les notes en appuyant sur enter entre chacunes");
		somme = sc.nextDouble();
		somme += sc.nextDouble();
		somme += sc.nextDouble();
		somme += sc.nextDouble();
		System.out.println("Somme : " + somme);
		moyenne = somme / 4;
		System.out.println("Moyenne : " + moyenne);
	}
}

// Exercice 6

import java.util.Scanner;

public class Cercle {
	public static void main(String[] args) {
 	    double rayon, perimetre, surface;
 	    Scanner sc = new Scanner(System.in);
	    System.out.println("Rayon ? ");
	    rayon = sc.nextDouble();
	    perimetre = (double) (2 * Math.PI * rayon);
	    surface = (double) (Math.PI * rayon * rayon);
	    System.out.println("Perimetre : " + perimetre);
	    System.out.println("Surface : " + surface);
	}
}

// Exercice 7

import java.util.Scanner;

class Temperature {
	public static void main(String[] args) {
	    double celsius, fahrenheit ;
	    Scanner sc = new Scanner(System.in);
	    System.out.println("Temperature en Celsius ? ");
	    celsius = sc.nextDouble();
	    fahrenheit = 9 * celsius / 5 + 32;
	    System.out.println("Temperature en Fahrenheit : " + fahrenheit ); 
	}
}

// Exercice 8

import java.util.Scanner;

class Carat {
	public static void main(String[] args) {
	    double all, met, purete ;
	    Scanner sc = new Scanner(System.in);
	    System.out.print("Masse de l'alliage ? ");
	    all = sc.nextDouble();
	    System.out.print("Masse de métal précieux ? ");
	    met = sc.nextDouble();
	    purete = (met * 24) / all;
	    System.out.print("Purete de l'alliage (en carats) : " + purete);
	}
}

//Exercice 9

import java.util.Scanner;

class Euclide {
	public static void main(String[] args) {
            int a, b, q, r;
	    Scanner sc = new Scanner(System.in);
	    System.out.print("Premier entier ? ");
	    a = sc.nextInt();
	    System.out.print("Deuxieme entier ? ");
	    b = sc.nextInt();
	    q = a / b ;
	    r = a % b ;
	    System.out.print(+a);
	    System.out.print(" = " +b);
	    System.out.print(" * " +q);
	    System.out.print(" + " +r);
	}
}

// Exercice 10

import java.util.Scanner;

class Seconde {
	public static void main(String[] args) {
	    int init, min_temp, heure, minute, seconde;
	    Scanner sc = new Scanner(System.in);
	    System.out.print("Combien de secondes ? ");
	    init = sc.nextInt();
	    seconde = init % 60;
	    min_temp = (init - seconde) / 60;
	    heure = min_temp / 60;
	    minute = init % 60;
	    System.out.print(+ min_temp);
	    System.out.print(" secondes valent " + heure);
	    System.out.print(" heures, " + minute);
	    System.out.print(" minutes et " + seconde);
	    System.out.print("secondes");
	}
}

// Exercice 11

class Transtypage {
	public static void main(String[] args) {
		System.out.println("7.2 / 4 = " + 7.2 / 4 );
		System.out.println("7 / 4.5 = " + 7 / 4.5 );
		System.out.println("7.2 / 4.5 = " + 7.2 / 4.5 );
		System.out.println("7 / 4 = " + 7 / 4 );
		System.out.println("(int) (7.2 / 4) = " + ((int) (7.2 / 4)) );
		System.out.println("(double) (7 / 4) = " + ((double) (7 / 4)) );
		System.out.println("(int) 7.2 / 4 = " + ((int) 7.2 / 4) );
		System.out.println("(int) 7.2 / 4.1 = " + ((int) 7.2 / 4.1) );
		System.out.println("(double) 7 / 4 = " + ((double) 7 / 4) );
	}
}

// Exercice 12

import java.util.Scanner;

class Aleatoire {
	public static void main(String[] args) {
	    double aleaf;
	    int taille, n1, n2, aleai;
	    Scanner sc = new Scanner(System.in);
	    System.out.print("Premier nombre de l'intervalle ");
	    n1 = sc.nextInt();
	    System.out.print("Deuxième nombre de l'intervalle ");
	    n2 = sc.nextInt();
	    taille = n2 - n1 +1;
	    aleaf = taille * Math.random();
            aleai = (int) aleaf + n1;
	    System.out.print(aleai);
	}
}

// Exercice 13

import java.util.Scanner;

class Moyenne2 {
	public static void main(String[] args) {
	    double somme, moyenne;
	    int precision, precision2;
	    somme = (double) 0.0 ;
	    Scanner sc = new Scanner(System.in);
	    System.out.println("Entrez les notes en appuyant sur enter entre chacunes");
	    somme = sc.nextDouble();
	    somme += sc.nextDouble();
	    somme += sc.nextDouble();
	    somme += sc.nextDouble();
	    System.out.print("Quelle précision ?");
	    precision = sc.nextInt();
	    precision2 = (int) java.lang.Math.pow(10,precision);
	    somme = (double) ( (int) (somme * precision2) ) / precision2;
	    System.out.println("Somme : " + somme);
	    moyenne = somme / 4;
	    moyenne = (double) ( (int) (moyenne * precision2) ) / precision2;
	    System.out.println("Moyenne : " + moyenne);
	}
}

class Cercle2 {
	public static void main(String[] args) {
	    double rayon, perimetre, surface;
	    int precision, precision2;
	    Scanner sc = new Scanner(System.in);
	    System.out.print("Rayon ? ");
	    rayon = sc.nextDouble();
	    System.out.print("Quelle précision ?");
	    precision = sc.nextInt();
	    precision2 = (int) java.lang.Math.pow(10,precision);
	    perimetre = (double) (2 * Math.PI * rayon);
	    perimetre = (double) ( (int) (perimetre * precision2) ) / precision2;
	    surface = (double) (Math.PI * rayon * rayon);
	    surface = (double) ( (int) (surface * precision2) ) / precision2;
	    System.out.println("Perimetre : " + perimetre);
	    System.out.println("Surface : " + surface);
	}
}

class Temperature2 {
	public static void main(String[] args) {
	    double celsius, fahrenheit ;
	    int precision, precision2;
	    Scanner sc = new Scanner(System.in);
	    System.out.print("Temperature en Celsius ? ");
	    celsius = sc.nextDouble();
	    System.out.print("Quelle précision ?");
	    precision = sc.nextInt();
	    precision2 = (int) java.lang.Math.pow(10,precision);
	    fahrenheit = 9 * celsius / 5 + 32;
	    fahrenheit = (double) ( (int) (fahrenheit * precision2) ) / precision2;
	    System.out.println("Temperature en Fahrenheit : " + fahrenheit ); 
	}
}

class Carat2 {
	public static void main(String[] args) {
	    double all, met, purete ;
            int precision, precision2;
	    Scanner sc = new Scanner(System.in);
	    System.out.print("Masse de l'alliage ? ");
	    all = sc.nextDouble();
	    System.out.print("Masse de métal précieux ? ");
	    met = sc.nextDouble();
	    System.out.print("Quelle précision ?");
	    precision = sc.nextInt();
	    precision2 = (int) java.lang.Math.pow(10,precision);
	    purete = (met * 24) / all;
	    purete = (double) ( (int) (purete * precision2) ) / precision2;
	    System.out.print("Purete de l'alliage (en carats) : " + purete);
	}
}

// Exercice 14

class Bool {
	public static void main(String[] args) {
		System.out.println("10 > 5 = " + (10 > 5));
		System.out.println("10 == 5 = " + (10 == 5));
		System.out.println("5 == 5 = " + (5 == 5));
		System.out.println("5 == 11 - 6 = " + (5 == 11 - 6));
		System.out.println("false || (5 != 4) = " + (false || (5 != 4)));
		System.out.println("false && (5 != 4) = " + (false && (5 != 4)));
		System.out.println("!(30 % 3 == 0) = " + (!(30 % 3 == 0)));
		System.out.println("0.3 - 0.2 == 0.2 - 0.1 = " + (0.3 - 0.2 == 0.2 - 0.1));
	}
}

// Exercice 15

import java.util.Scanner;

class TestExpression {
	public static void main(String[] args) {
		int n1, n2, n3;
		Scanner sc = new Scanner(System.in);
		System.out.print("Premier nombre ? ");
		n1 = sc.nextInt();
		System.out.print("Deuxieme nombre ? ");
		n2 = sc.nextInt();
		System.out.print("Troisieme nombre ? ");
		n3 = sc.nextInt();
		System.out.print ((n1 < n2)&&(n2 < n3));
	}
}

// Exercice 16

import java.util.Scanner;

public class TestAnnee {
    public static void main(String[] args) {
    	int a;
        Scanner sc = new Scanner(System.in);
        System.out.print("Quelle annee ? ");
        a = sc.nextInt();
        System.out.print ((a % 4 ==0) && (!(a % 100 == 0) || (a % 400 == 0)));
    }
}