Homework 1

1. ПРАВОЪГЪЛНИК
 import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    double a = scan.nextDouble();
    System.out.println("a:"+a);
    double b = scan.nextDouble();
    System.out.println("b:"+b);
    double P = 2*(a+b);
    double S = a*b;
    System.out.println("P="+P);
    System.out.println("S="+S);
  }
}



2.ТРАПЕЦ
import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    double a = scan.nextDouble();
    System.out.println("a:"+a);
    double b = scan.nextDouble();
    System.out.println("b:"+b);
     double h = scan.nextDouble();
    System.out.println("h:"+ h);
    double S = (a + b)/ 2 * h;
    System.out.println("S="+S);
  }
}


3.КРЪГ
import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    double R = scan.nextDouble();
    double C =2*3.14*R;
    double S = 3.14*R*R;
    System.out.println("r:"+r);
    System.out.println("C="+C);
    System.out.println("S="+S);
  }
}


4.ПАРИЧКИ
import java.util.Scanner;

class Main {
  public static void main(String[] args) {
   Scanner scanner = new Scanner(System.in);
   int BC = scanner.nextInt();
   double yuan = scanner.nextDouble();
   double c = scanner.nextDouble()/100;
   double BCtoBGN = BC*1168;
   double YUANtoUSD = yuan*0.15;
   double YUANtoBGN = YUANtoUSD * 1.76;
   double euro = (BCtoBGN + YUANtoBGN)/1.95 - ((BCtoBGN + YUANtoBGN)/1.95*c);
   System.out.println(euro);
  }
}