16 lines
291 B
C++
16 lines
291 B
C++
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#include <iostream>
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#include <map>
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using namespace std;
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int main()
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{
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map<int, string> m;
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m.insert(make_pair(1, "disen"));
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m.insert(make_pair(2, "lucy"));
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cout << m.size() << endl;
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m.erase(1); // 删除键值为 1 的元素
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cout << m.size() << endl;
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return 0;
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}
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