package com.yaxing.suanfa;

public class ArrayDemo {
    
    /**
     * 改变了数组
     * */
    public static int[] reverseArray(int[] a){
        int temp;
        for(int i=0;i<a.length/2;i++){
            temp = a[i];
            a[i] = a[a.length-1-i];
            a[a.length-1-i] = temp;
        }
        return a;
    }
    
    public static char[] reverseArray(char[] a){
        char temp;
        for(int i=0;i<a.length/2;i++){
            temp = a[i];
            a[i] = a[a.length-1-i];
            a[a.length-1-i] = temp;
        }
        return a;
    }
    /**
     * 使用泛型
     * */
    public Object[] reverseArray1(Object[] a){
        Object temp;
        for(int i=0;i<a.length/2;i++){
            temp = a[i];
            a[i] = a[a.length-1-i];
            a[a.length-1-i] = temp;
        }
        return a;
    }
    /**
     * 逆序输出，不逆转数组
     * */
    public static int[] reverseArrayPrint(int[] a){
         
        for(int i=0;i<a.length;i++){
            if(i==a[a.length-1]){
                System.out.print(a[a.length-1-i]+" ");
            }else{
                System.out.print(a[a.length-1-i]+"、");
            }
        }
        return a;
    }
    /**
     * @param args
     */
    public static void main(String[] args) {
        int a[] = new int[100];
        for(int i=0;i<a.length;i++){
            a[i]=i;
        }
        System.out.println("原始数组：");
        for(int i:a){
            if(i==a[a.length-1]){
                System.out.print(i+" ");
            }else{
                System.out.print(i+"、");
            }
        }
        System.out.println();
        int b[] = ArrayDemo.reverseArray(a);
        System.out.println("逆转后数组：");
        for(int i:b){
            if(i==b[b.length-1]){
                System.out.print(i+" ");
            }else{
                System.out.print(i+"、");
            }
        }
        System.out.println();
        System.out.println("只逆序打印数组");
        ArrayDemo.reverseArrayPrint(a);
        String cc = "abcdefg";
        char c[] = cc.toCharArray();;
        ArrayDemo.reverseArray(c);
        System.out.println();
        System.out.println("逆序字符串");
        for(char i:c){
            if(i==c[c.length-1]){
                System.out.print(i+" ");
            }else{
                System.out.print(i+"、");
            }
        }
    }

}