2023.5.14

 1 #include <iostream>
 2 using namespace std;
 3 #include <vector>
 4 void printVector(vector<int>&v)
 5 {
 6     for (vector<int>::iterator it = v.begin(); it < v.end(); it++)
 7     {
 8         cout << *it << " ";
 9     }
10     cout << endl;
11 }
12 void test01()
13 {
14     vector<int> v1;//默认构造，无参构造
15     for (int i = 0; i < 10; i++)
16     {
17         v1.push_back(i);
18     }
19     printVector(v1);
20     vector<int>v2(v1.begin(), v1.end());//通过区间方式进行构造
21     printVector(v2);
22     vector<int>v3(10, 100);//通过n个element的方式进行构造
23     printVector(v3);
24     if (v1.empty())
25     {
26         cout << "v1为空" << endl;
27     }
28     else
29     {
30         cout << "v1不为空" << endl;
31     }
32     cout << "v1的容量：" << v1.capacity() << endl;
33     cout << "v1的大小：" << v1.size() << endl;
34     v1.resize(20, 100);
35     printVector(v1);
36 }
37 
38 int main()
39 {
40     test01();
41     return 0;
42 }