// 添加元素到向量中 myVector.push_back(3); myVector.push_back(7); myVector.push_back(11); myVector.push_back(5); // 访问向量中的元素并输出 std::cout<<"Elements in the vector: "; for(intelement:myVector){ std::cout<<element<<" "; } std::cout<<std::endl; // 访问向量中的...
vector<string> cars = {"Volvo", "BMW", "Ford", "Mazda"}; cout << cars.back(); Try it Yourself » Definition and UsageThe back() function returns a reference to the last element in a vector.Tip: Values can be assigned to the reference, which will change the vector....
$g++ ./test.cpp$./a.out1145855 解释# 官方文档的说法 end():An iterator to the elementpastthe end of the sequence. back():A reference to the last element in the vector. end()返回末尾元素itor+1的结果,数值无法预料。 back()返回末尾元素的引用,可以正常修改。 日常使用for循环配合itor自增的...
When compiling with _SECURE_SCL 1, a runtime error will occur if you attempt to access an element in an empty vector. SeeChecked Iteratorsfor more information. Example // vector_back.cpp // compile with: /EHsc #include <vector> #include <iostream> int main() { using namespace std; ve...
}///reference:http://en.cppreference.com/w/cpp/container/vector/emplace_backnamespace{structPresident { std::stringname; std::stringcountry;intyear; President(std::stringp_name, std::stringp_country,intp_year) : name(std::move(p_name)), country(std::move(p_country)), year(p_year) ...
A;//A.push_back里必须是vectorvector<int> B;B.push_back(0);B.push_back(1);B.push_back(...
// INTEGER VECTOR EXAMPLE// CPP program to illustrate// Implementation of emplace() function#include<iostream>#include<vector>usingnamespacestd;intmain(){vector<int> myvector; myvector.emplace_back(1); myvector.emplace_back(2); myvector.emplace_back(3); ...
1.使用push_back函数将元素添加到向量中 2.检查向量的大小是否为0,如果不是,则将初始化为0的计数器变量增加,并弹出back元素。 3.重复此步骤,直到向量的大小变为0。 4.打印变量的最终值。 // CPP program to illustrate// Application ofpush_backand pop_back function#include<iostream>#include<vector>using...
#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...
When compiling with _SECURE_SCL 1, a runtime error will occur if you attempt to access an element in an empty vector. See Checked Iterators for more information. Example 複製 // vector_back.cpp // compile with: /EHsc #include <vector> #include <iostream> int main() { using namespace...