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[mirrors/Programs.git] / java / pisemka / Analyze.java.txt

import java.io.*;
import java.util.*;
import java.lang.Math;

/** Pisemka - program "Analyze"
 * Copylefted by: Harvie 2oo9 ( http://blog.harvie.cz/ )
 * @author      Thomas Harvie Mudrunka (mudruto1)
 * @version     1.0
 */
/* Priklad:
Zadavej posloupnost ukoncenou zapornym cislem:
1 
2
3
4
5
-1
Byla zadana nasledujici rada:
1.0; 2.0; 3.0; 4.0; 5.0;
minimum = 1.0
maximum = 5.0
Cisla delitelna 3.0:
3.0;
prumer = 3,00
Prvocisla:
2.0; 3.0; 5.0;
*/
class analyzator {
	private double[] seq = new double[101];
	private Scanner sc = new Scanner(System.in);

	public boolean readSeq() {
		System.out.println("Zadavej posloupnost ukoncenou zapornym cislem:");
		int i;;
		for(i=0;i<seq.length;i++) {
			try {
				seq[i] = sc.nextDouble();
			} catch(Exception e) {
				return false;
			}
			if(seq[i] < 0) break;
		}
		System.out.println("Byla zadana nasledujici rada:");
		for(i=0;i<seq.length;i++) {
			if(seq[i] < 0) break;
			System.out.print(seq[i]+"; ");
		}
		System.out.println("");
		return true;
	}

	public void vypisMinimax() {
		double min = seq[0], max = seq[0];
		int i;
		for(i=1;i<seq.length;i++) {
			if(seq[i] < 0) break;
			if(seq[i] < min) min = seq[i];
			if(seq[i] > max) max = seq[i];
		}
		System.out.println("minimum = "+min);
		System.out.println("maximum = "+max);
	}

	public void vypisDelitelne(double a) {
		System.out.println("Cisla delitelna "+a+":");
		int i;
		for(i=0;i<seq.length;i++) {
			if(seq[i] < 0) break;
			if((seq[i] % a) == 0) System.out.print(seq[i]+"; ");
		}
    System.out.println("");
	}

	public boolean jePrvocislo(double a) {
		if(a <= 1) return false;
		if(a == 2) return true;
		if(a % 2 == 0) return false;
		int i;
		for(i = 3; i <= Math.sqrt(a); i += 2){
			if(a % i == 0) return false;
		}
		return true;
	}

	public void vypisPrvocisla() {
		System.out.println("Prvocisla:");
		int i;
		for(i=0;i<seq.length;i++) {
			if(seq[i] < 0) break;
			if(jePrvocislo(seq[i])) System.out.print(seq[i]+"; ");
		}
    System.out.println("");
	}

	public void vypisPrumer() {
		int i, max;
		double avg = 0;
		for(max=0;max<seq.length;max++) if(seq[max] < 0) break;
		for(i=0;i<max;i++) avg += (seq[i]/max);
    System.out.printf("prumer = %.2f\n",avg);
	}
}

public class Analyze {
	public static void main(String[] argv) {
		//System.out.println("\n");
		analyzator a = new analyzator();
		if(!a.readSeq()) {
			System.err.println("Neco je spatne.");
			System.exit(1);
		}
		a.vypisMinimax();
		a.vypisDelitelne(3);
		a.vypisPrumer();
		a.vypisPrvocisla();
	}
}