domashno 17.10

Правоъгълник

import java.util.Scanner;

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


Трапец

import java.util.Scanner;

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

кръгче
import java.util.Scanner;

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

    double S = 3.14*r*r;
    System.out.println("S = "+ S);
  }
}



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 yuantousd=yuan*0.15;
   double yuantobg=yuantousd*1.76;
   double bctobg=bc*1168;
   double euro = (yuantobg + bctobg)/1.95 - (yuantobg + bctobg*c)/1.95;

   System.out.println(euro);

  }
}