clear函数
语法:
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void clear(); |
clear()清除所有元素
源代码
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/** * Erases all elements in a %set. Note that this function only erases * the elements, and that if the elements themselves are pointers, the * pointed-to memory is not touched in any way. Managing the pointer is * the user's responsibilty. */ void clear() { _M_t.clear(); } |
测试代码
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// 梁笔记 // https://zouzhongliang.com #include <iostream> #include <set> using namespace std; int main() { set<int> s1; s1.insert(10); s1.insert(12); s1.insert(13); s1.insert(9); cout<<"s1集合中元素数量："<<s1.size()<<endl; s1.clear(); cout<<"s1集合中元素数量："<<s1.size()<<endl; } |
测试结果：
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s1集合中元素数量：4 s1集合中元素数量：0 |