std::swap函数用于交换两个元素, 其中std::vector::swap函数可以交换两个不同向量容器的所有元素。 以下是std::swap和std::vector::swap之间的一些主要关键区别, 程序1:说明使用std::swap()交换两个向量。 // CPP program to illustrate swapping // of two vectors using std::swap() #include<bits/stdc++...
程序2:说明使用 std::vector::swap() 交换两个向量。 CPP // CPP program to illustrate swapping // of two vectors using std::vector::swap() #includeusing namespace std; int main() { vectorv1 = { 1, 2, 3 }; vectorv2 = { 4, 5, 6 }; // swapping the above two vectors // usi...
};voidtest_std_swap(std::vector<double>& v1, std::vector<double>& v2){for(inti =0; i < N; i ++) { std::swap(v1,v2); std::swap(v2,v1); } }voidtest_swap_vector(std::vector<double>& v1, std::vector<double>& v2){for(inti =0; i < N; i ++) { v1.swap(v2); ...
Swapping two vectors does not invalidate the iterators, pointers, and references to its elements (C++03, 23.1.11). Typically the iterator would contain knowledge of its container, and the swap operation maintains this for a given iterator. In VC++ 10 the vector container is managed using this ...
swap(x[0], x[1]); // same as std::vector<bool>::swap(x[0], x[1]); println("after swap, x: ", x); println("swap elements of two different vectors:"); std::vector<bool> y{0, 0, 1}; println("before swap, x: ", x); println("before swap, y: ", y); y.swap(x...
In the below example we are going to see how to swap the contents of two vectors. In the same way, we can swap be/w object of any container. #include <bits/stdc++.h>usingnamespacestd;voidprint(vector<int>a) {for(autoit:a) { cout<<it<<" "; } cout<<endl; }intmain() { vec...
For one thing, it's only two statements. For another, it doesn't preserve the ordering of the vector elements, which rather limits its usefulness. For a third, most of the operations on vectors use iterators, not indices. Can you show us an example of where such a function would be ...