12.7.. Napisati program koji će za učitanu vrijednost K iN izračunati vrijednost izraza i ispisati::

Opis rješenja:

Listing programa:

package zadatak;
import java.util.Scanner;
public class P12700052 {
	public static void main(String[] args)	{
	Scanner input = new Scanner (System.in);

	System.out.println ("Sumu prema izrazu");
    int k, n, znak=1;;
    double s=0;

    System.out.print("n: ");
    n = input.nextInt(); 
    System.out.print("Koeficijen: ");
    k = input.nextInt();   
    int i=0; 
    while (i<= n;){
	    s = s + znak * (i+1) /(double)(k + i);    // s1+=znak * /(double)(i + 1);
	    znak = -znak;
		 i++;
	}
    System.out.println("n = " + n + "  k = " + k + "   s = " + s);
	}
}

II Varijanta
package zadatak;
import java.util.Scanner;
public class P12700052_2; {
	public static void main(String[] args)	{
	Scanner input = new Scanner (System.in);

    System.out.println ("Sumu prema izrazu");
    int k, n;
    double s=0, s1=0, s2=0;

    System.out.print("n: ");
    n = input.nextInt(); 
    System.out.print("Koeficijen: ");
    k = input.nextInt();   
    int i=0;
    while ( i<= n; ){    			
    	if (i%2 != 0)
    		s1 = s1 + (i+1)/(double)(k+i);
    	else
    		s2 = s2 + (i+1)/(double)(k+i);
    	s = s1 - s2;
		i++;
	}
    System.out.println("n = " + n + "  k = " + k + "   s = " + s);
	}
}

Ispis na ekranu:

Index