1 #include<iostream>
 2 using namespace std;
 3 void add(int* &a, int length) {
 4     int c = 1;
 5     //c代表进位，完成对数组的更新，并保留最高为的进位；
 6     for (int i = length - 1;i >= 0;i--) {
 7         if ((a[i] += c) == 10) {
 8             c = 1;
 9             a[i] = 0;
10         }
11         else {
12             c = 0;
13         }
14     }
15     if (c == 1) {//最高位发生进位；
16         int*oldElem = a;//保留旧的数组地址；
17         a = new int[++length];
18         //将就数组数据迁至新数组；
19         for (int i = 0, k = 1;k<length;k++) 
20             a[k] = oldElem[i++];
21         a[0] = 1;//最高位赋值为1；
22         delete[]oldElem;
23     }
24     for (int i = 0;i<length;i++)//数据的输出；
25         cout << a[i] << " ";
26     
27 }
28 int main()
29 {
30     int n;
31     cin>>n;
32     int* a = new int[n];
33     for (int i = 0;i<n;i++)
34         cin >> a[i];
35     add(a, n);
36     delete[]a;
37 }