package follow_pack;

import java.util.Arrays;

import java.text.DecimalFormat;

public class exp {

    public static void main(String[] args) {

        int array[] = {37,42,13,29,-9,6,33};

        for(int num : array) {

            System.out.print(num+" ");

        }

        System.out.println("");

        // 排序

        Arrays.sort(array);

        for(int num : array) {

            System.out.print(num+" ");

        }

        System.out.println(" ");

        // 二分查找

        System.out.println("查找33的结果如下："+Arrays.binarySearch(array, 33));

        int arrayB[] = new int[array.length];

        // 复制数组 copyOf,3代表要复制的元素个数

        arrayB = Arrays.copyOf(array, 3);

        for(int num: arrayB) {

            System.out.print(num+" ");

        }

        System.out.println(" ");

        // 复制数组 copyOfRange

        int arrayC[] = new int[array.length];

        arrayC = Arrays.copyOfRange(array, 4, 20);

        for(int num: arrayC) {

            System.out.print(num+" ");

        }

        System.out.println(" ");

        // 填充

        Arrays.fill(arrayC, 20);

        for(int num: arrayC) {

            System.out.print(num+" ");

        }

        System.out.println(" ");

        int arrayD[] = new int[10];

        Arrays.fill(arrayD, 1 ,3 , 12);

        for(int num: arrayD) {

            System.out.print(num+" ");

        }

        System.out.println(" ");

        // 比较数组

        System.out.println("arrayB == arratC?:"+Arrays.equals(arrayB, arrayC));

    }

}

public class exp {

    public static void main(String[] args) {

        int n=10;

        int[] table = new int[n+1];

        table[0] = 1;

        for(int i=1;i<=n;i++) {

            for(int j=0;j<i;j++) {

                System.out.print(" "+table[j]);

            }

            System.out.println();

            for(int j=i; j>0; j--)

                table[j] = table[j-1]+table[j];

        }

    }

}