#include <inplace_vector> #include <print> int main() { std::inplace_vector<int, 4> numbers{1, 2, 3}; for (; not numbers.empty(); numbers.pop_back()) std::println("{}", numbers); } 输出: [1, 2, 3] [1, 2] [1]参阅...
#include <vector> #include <iostream> namespace stq { template<typename T> void println(auto, const T& xz) { std::cout << '['; bool first{true}; for (const auto& x : xz) std::cout << (first ? first = false, "" : ", ") << x; std::cout << "]\n"; } } int main...
std::vector<T,Allocator>::pop_back From cppreference.com <cpp |container |vector Removes the last element of the container. Callingpop_backon an empty container results in undefined behavior. Iterators (including theend()iterator) and references to the last element are invalidated. ...
resizeIf the vector changed capacity, all of them. If not, onlyend()and any elements erased. pop_backThe element erased andend(). Member types Member typeDefinition value_typeT allocator_typeAllocator size_typeUnsigned integer type (usuallystd::size_t) ...
See the example SimpleVector class. 7. File Operations Data TypeDescription ifstream Input file stream. Can be used to read data from files. ofstream Output file stream. Can be used to create write data to files. fstream File stream. Can be used to read and write data to/from files. ifs...
true; } void VBOMesh::UpdateVertexPosition(const FbxMesh * pMesh, const FbxVector4 * pVertices) const { // Convert to the sequence with datain GPU. float lVertices = NULL; int lVertexCount = 0; if (mAllByControlPoint) { lVertexCount = pMesh->PointsCount(); l...
一些实现在 push_back 导致会超出 max_size 的重分配时会抛出 std::length_error,这是由于这会隐式调用 reserve(size() + 1) 的等价者。 示例运行此代码 #include <iomanip> #include <iostream> #include <string> #include <vector> int main() { std::vector<std::string> letters; letters.push_...
resizeIf the vector changed capacity, all of them. If not, onlyend()and any elements erased. pop_backThe element erased andend(). Member types Member typeDefinition value_typeT allocator_typeAllocator size_typeUnsigned integer type (usuallystd::size_t) ...
vector::clear vector::insert vector::emplace (C++11) vector::erase vector::push_back vector::emplace_back (C++11) vector::pop_back vector::resize vector::swap std::vector<bool> specific vector<bool>::flip vector<bool>::swap Non-member functions operator==operator!=operator<operator>operato...
std::vector letters holds: "abc" "def" Moved-from string s holds: "" See also emplace_back (C++11) constructs an element in-place at the end (public member function) pop_back removes the last element (public member function) back_inserter ...