21 lines
527 B
C++
21 lines
527 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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int main()
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{
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int arr1[5] = {1, 2, 3, 4, 5};
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vector<double> v1(arr1, arr1 + 5);
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cout << "size: " << v1.size() << endl;
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cout << "capacity: " << v1.capacity() << endl;
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cout << "first addr: " << &v1[0] << endl;
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v1.resize(20); // 重新指定容器的长度
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cout << "size: " << v1.size() << endl;
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cout << "capacity: " << v1.capacity() << endl;
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// 调整前后首地址会发生变化
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cout << "first addr: " << &v1[0] << endl;
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return 0;
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}
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