29 lines
757 B
C++
29 lines
757 B
C++
|
// vector 的使用
|
||
|
|
|
||
|
|
#include <bits/stdc++.h>
|
||
|
|
|
||
|
|
using namespace std;
|
||
|
|
|
||
|
|
int main()
|
||
|
|
{
|
||
|
|
vector<int> v1;
|
||
|
|
// int mSize = v1.size(); // 获取容器中元素的个数
|
||
|
|
int mCapacity = v1.capacity(); // 获取容器的容量
|
||
|
|
int cnt = 0; // 扩容次数
|
||
|
|
cout << "初始容量: " << mCapacity << endl;
|
||
|
|
for (int i = 0; i < 1000; i++)
|
||
|
|
{
|
||
|
|
v1.push_back(i); // 向容器中添加元素
|
||
|
|
// cout << "size = " << v1.size() << " capacity = " << v1.capacity() << endl;
|
||
|
|
if (mCapacity != v1.capacity())
|
||
|
|
{
|
||
|
|
|
||
|
|
mCapacity = v1.capacity();
|
||
|
|
cout << "第" << ++cnt << "次扩容, "
|
||
|
|
<< "当前容量为: " << v1.capacity() << endl;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|