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示例输入 数据= {{},{3,11,4},{1,2},{5,6}; 输出 最大值= 11 我有一个2d数组,使用max_element,我试图从数组中的值中得到最大值。使用一维迭代器,您可以取消迭代器的引用并获得值,即*iteratorOneD。但是我怎么能用2d迭代器做这样的事情呢?我试过几种类似的方法。 vector<vector <int>>::iterator ...
std::max_element std::min_element 完整示例代码: 点击查看代码 #include<iostream>#include<vector>#include<algorithm>intmain(){//构造std::vector<int>v0(3,100);//3个100,即相当于v0 {100,100,100}std::vector<int> v1 = {1,2,3,4};//有无 = 都正确//增加std::vector<int> vec1{1,2...
std::cout<<"capacity:"<< myvector.capacity() <<"\n"; std::cout<<"max_size:"<< myvector.max_size() <<"\n";return0; } A possible outputforthisprogram could be: size:100capacity:128max_size:1073741823 size 返回实际容量 capacity 返回默认容量 max_size 返回向量可以容纳的最大元素数,这...
std::vector<int> vec; vec.push_back(6); vec.push_back(-17); vec.push_back(12); // Deletes the second element (vec[1]) vec.erase(std::next(vec.begin())); 或者,要一次删除多个元素: // Deletes the second through third elements (vec[1], vec[2]) vec.erase(std::next(vec....
max_size returns the maximum possible number of elements (public member function) reserve reserves storage (public member function) capacity returns the number of elements that can be held in currently allocated storage (public member function) ...
cout<<"vector:myvt, maxsize is "<<m1<<endl; myvt.resize(10);//重设大小cout<<"resize: 10."<<endl;intn1=myvt.capacity();intn2=myvt.size(); cout<<"vector:myvt, capacity is "<<n1<<endl; cout<<"vector:myvt, size is "<<n2<<endl;// 如果为空值则打印 * 号for(it=myvt....
std::vector<T,Allocator>::max_size From cppreference.com <cpp |container |vector Returns the maximum number of elements the container is able to hold due to system or library implementation limitations, i.e.std::distance(begin(), end())for the largest container. ...
max_size returns the maximum possible number of elements (public member function) reserve reserves storage (public member function) capacity returns the number of elements that can be held in currently allocated storage (public member function) shrink_to_fit (C++11) reduces memory us...
max_size returns the maximum possible number of elements (public member function) reserve reserves storage (public member function) capacity returns the number of elements that can be held in currently allocated storage (public member function) ...