Lab03

package com.Talar;

import java.util.Scanner;
import java.util.Random;

public class Main {

    public static void main(String[] args) {
        WyborZadania();
    }

    private static void WyborZadania(){
        Scanner input = new Scanner(System.in);
        System.out.println("Dostępne zadania:\n1-10. Tablice");
        System.out.print("Przejdż do zadania: "); int wybor = input.nextInt();

        switch(wybor){
            case 1:
                Zad1(); break;
            case 2:
                Zad2(); break;
            case 3:
                Zad3(); break;
            case 4:
                Zad4(); break;
            case 5:
                Zad5(); break;
            case 6:
                Zad6(); break;
            case 7:
                Zad7(); break;
            case 8:
                Zad8(); break;
            case 9:
                Zad9(); break;
            case 10:
                Zad10(); break;
            default:
                WyborZadania(); break;
        }
    }

    private static void Zad1(){
        int suma[][] = new int[10][10];
        Random rand = new Random();
        int r = 0; int wynik = 0;

        for(int i = 0; i < suma.length; i++){
            for(int j = 0; j < suma.length; j++){
                r = rand.nextInt(10);
                suma[i][j] = r;
            }
        }

        for(int k = 0; k < suma.length; k++){
            for(int l = 0; l < suma.length; l++){
                wynik += suma[k][l];
            }
        }

        System.out.println(wynik);
    }

    private static void Zad2(){
        int tablica[][] = new int[10][5];
        Random rand = new Random();
        int r = 0; int suma = 0; int max = -2147483648; int wiersz = 0;

        for(int i = 0; i<10; i++){
            for(int j = 0; j<5; j++){
                r = rand.nextInt(10);
                tablica[i][j] = r;
                suma += tablica[i][j];
            }
            System.out.println("Suma wiersza " + i + ": " + suma);
            if(suma>max){ max = suma; wiersz = i; }
            suma = 0;
        }
        System.out.print("Największa suma wiersza, wiersz: " + wiersz + ", suma: " + max);
    }

    private static void Zad3(){
        //Sortowanie bąbelkowe
        int tablica[] = new int[20];
        Random rand = new Random();
        int r = 0; int n = tablica.length; int temp = 0;

        for(int i = 0; i < n; i++){
            r = rand.nextInt(25);
            tablica[i] = r;
            System.out.println("tablica[" + i + "] = " + tablica[i]);
        }

        System.out.println("\nSortowanie bąbelkowe:");
        for(int i = 0; i < n; i++){
            for(int j = 1; j < n; j++){
                if(tablica[j-1]>tablica[j]){
                    temp = tablica[j-1];
                    tablica[j-1] = tablica[j];
                    tablica[j] = temp;
                }
            }
        }

        for(int i = 0; i < tablica.length; i++){
            System.out.println("tablica[" + i + "] = " + tablica[i]);
        }
    }

    private static void Zad4(){
        Random rand = new Random();
        int tab1[][] = new int[4][4];
        int tab2[][] = new int[4][4];
        int suma[][] = new int[4][4];

        for(int i = 0; i < 4; i++){
            for(int j = 0; j < 4; j++){
                int r1 = rand.nextInt(100);
                int r2 = rand.nextInt(100);
                tab1[i][j] = r1;
                tab2[i][j] = r2;
                suma[i][j] = tab1[i][j] + tab2[i][j];
                //System.out.println("tab1[][] " + tab1[i][j] + " tab2[][]" + tab2[i][j]);
                System.out.println(tab1[i][j] + ", " + tab2[i][j] + ", suma: " + suma[i][j] );
            }
        }
    }

    private static void Zad5(){
        //Do dokonczenia
        Scanner input = new Scanner(System.in);
        Random rand = new Random();
        System.out.print("Wprowadź liczbe: "); int n = input.nextInt();
        int dane[][] = new int[10][n];

        for(int i = 0; i < 10; i++){
            System.out.print("liczba: "); dane[i][0] = input.nextInt();
        }

        for(int j = 0; j < 10; j++){
            for(int k = 1; k < n; k++){
                dane[j][k] = rand.nextInt(1*dane[j][0]);
            }
        }

        for(int j = 0; j < 10; j++){
            for(int k = 0; k < n; k++){
                System.out.print("j: " + j+", k: "+k+" = " + dane[j][k] +"\n");
            }
            System.out.print("\n");
        }
    }

    private static void Zad6(){
        Random rand = new Random();
        int tab[] = new int[10];
        int max = -2147483648; int min = 2147483647;
        int suma = 0; int mniejsze = 0; int wieksze = 0;

        for(int i = 0; i < tab.length; i++){
            tab[i] = rand.nextInt(20)-10;
            System.out.println("tablica[" + i + "] = " + tab[i]);

            if(tab[i] > max) { max = tab[i]; }
            if(tab[i] < min) { min = tab[i]; }
            suma += tab[i];
        }

        for(int i = 0; i < tab.length; i++){
            if(tab[i] > (suma/tab.length)) {
                wieksze++;
            }
            else{
                mniejsze++;
            }
        }

        System.out.println("Max: " + max + ", Min: " + min + "\nSuma: " + suma + ", Śr aryt: " + (suma/tab.length));
        System.out.println("Ilość wiekszych od sr. aryt: " + wieksze + ", mniejszych: " + mniejsze +"\n");

        for(int j = tab.length-1; j >= 0; j--){
            System.out.println("tab["+j+"]"+tab[j]);
        }
    }

    private static void Zad7(){
        Random rand = new Random();
        int tab[] = new int[20];
        int licznik = 0;

        for(int i = 0; i < tab.length; i++){
            tab[i] = rand.nextInt(10);
            System.out.println("tablica[" + i + "] = " + tab[i]);
        }

        for(int i = 0; i < 10; i++){
            for(int j = 0; j < tab.length; j++){
                if(i == tab[j]){
                    licznik++;
                }
            }
            System.out.println("Liczba: " + i + " występuje " + licznik + " razy.");
            licznik = 0;
        }
    }

    private static void Zad8(){
        Scanner input = new Scanner(System.in);
        System.out.print("Wprowadź liczbe: "); int n = input.nextInt();
        int zm[] = new int[32]; boolean znak = true;
        double w = 1; int i = 31; int pozycja = 0;

        if(n<0) { znak = false; n *= -1; }

        while(w!=0){
            w = div(n, 2);
            zm[i] = n%2;
            i--;
            n=(int)w;
        }

        if(znak==false){
            for(int j = 0; j < zm.length; j++){
                if(zm[j]==1){
                    pozycja = j - 1;
                    break;
                }
            }
            zm[pozycja]=1;
        }

        for(int j = 0; j < zm.length; j++){
            System.out.print(zm[j]);
        }
    }

    private static double div(int a, int b){

        return (Math.round(a/b - 0.5));
    }

    private static void Zad9(){
        //Ciąg fibonacciego
        long fib[] = new long[50];
        fib[0] = 1; fib[1] = 1;

        for(int i = 2; i < 50; i++){
            fib[i] = fib[i-1] + fib[i-2];
            System.out.println("Wyraz: " + (i+1) + ": " + fib[i]);
        }
    }

    private static void Zad10(){
        Scanner input = new Scanner(System.in);
        Scanner zad = new Scanner(System.in);
        System.out.print("Ile wyrazów: "); int n = input.nextInt();
        String tab[] = new String[n]; int a = 0; int b = 0;

        for(int i = 0; i < n; i++){
            System.out.print("Wyraz " + (i+1) + ": "); tab[i] = zad.nextLine();
        }

        for(int i = 0; i < tab.length; i++){
            for(int j = 0; j < tab[i].length(); j++){
                if(tab[i].charAt(j) == 98){
                    b = 1;
                }
            }
            if(tab[i].charAt(tab[i].length()-1) == 97){
                System.out.println("Kończy sie na a: " + tab[i]);
            }
            if(b==1){
                System.out.println("Zawiera b: " + tab[i]);
            }
        }

    }
}