52 lines
1015 B
C++
52 lines
1015 B
C++
// vector 的嵌套使用示例
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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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vector<vector<int> > vs; // 嵌套容器
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vector<int> v1, v2, v3;
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for (int i = 0; i < 9; i++)
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{
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switch (i / 3)
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{
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case 0:
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v1.push_back(i + 1);
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break;
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case 1:
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v2.push_back(i + 1);
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break;
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case 2:
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v3.push_back(i + 1);
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break;
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}
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}
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vs.push_back(v1);
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vs.push_back(v2);
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vs.push_back(v3);
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// for (int i = 0; i < vs.size(); i++)
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// {
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// for (int j = 0; j < vs[i].size(); j++)
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// {
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// cout << vs[i][j] << " ";
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// }
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// cout << endl;
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// }
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vector<vector<int> >::iterator it;
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for (it = vs.begin(); it != vs.end(); it++)
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{
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vector<int>::iterator it2;
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for (it2 = (*it).begin(); it2 != (*it).end(); it2++)
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{
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cout << *it2 << " ";
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}
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cout << endl;
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}
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return 0;
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}
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