public class DumplicatArray {
public static void main(String args[]){
int[] number=new int[0];
int[] fa={0};
duplicate(number,number.length,fa);
System.out.println(fa[0]);
}
// Parameters:
// numbers: an array of integers
// length: the length of array numbers
// duplication: (Output) the duplicated number in the array number,length of duplication array is 1,so using duplication[0] = ? in implementation;
// Here duplication like pointor in C/C++, duplication[0] equal *duplication in C/C++
// 这里è¦ç‰¹åˆ«æ³¨æ„~返回任æ„é‡å¤çš„一个，赋值duplication[0]
// Return value: true if the input is valid, and there are some duplications in the array number
// otherwise false
public static boolean duplicate(int numbers[],int length,int [] duplication) {
if(numbers.length==0){
return false;
}
int[] num=new int[numbers.length];
for(int i=0;i