作业

第一题
        
        long arr1[] = new long[]{1,2,3,4,5};
        
        long arr2[] = Arrays.copyOfRange(arr1, 0, 3);
        
        int i =0;
        while(i < arr1.length)
        {
            System.out.print(" "+arr1[i]);
            i++;
        }
        System.out.println();
        int j = 0;
        while(j < arr2.length)
        {
            System.out.print(" "+arr2[j]);
            j++;
        }
        System.out.println();
        
    //第二题
        
        long xsz[] = new long[]{2,56,98,43,1,3}; 
        
        for(long a = xsz.length;a > 0;a--)
        {
            for(int b = 0;b < xsz.length - 1;b++)
            {
                if(xsz[b] > xsz[b + 1])
                {
                    long c = xsz[b];
                    
                    xsz[b] = xsz[b + 1];
                    
                    xsz[b + 1] = c;
                }
            }
        }
        for(long v : xsz)
        {
            System.out.print(v +",");
        }
        System.out.println();
        System.out.println(" " + xsz[0]);