在本教程中,我们将讨论一个程序,以了解使用C ++中的STL进行的各种合并操作。
该merge()
函数用于合并两个已排序的容器,使新容器也被排序。还includes()
用于检查第二个容器中是否存在来自第一个容器的元素。
#include<iostream> #include<algorithm> #include<vector> using namespace std; int main(){ vector<int> v1 = {1, 3, 4, 5, 20, 30}; vector<int> v2 = {1, 5, 6, 7, 25, 30}; //初始化结果向量 vector<int> v3(12); merge(v1.begin(), v1.end(), v2.begin(), v2.end(), v3.begin()); cout << "The new container after merging is :\n"; for (int &x : v3) cout << x << " "; cout << endl; vector<int> v4 = {1, 3, 4, 5, 6, 20, 25, 30}; includes(v4.begin(), v4.end(), v1.begin(), v1.end())? cout << "v4 includes v1": cout << "v4 does'nt include v1"; return 0; }
输出结果
The new container after merging is : 1 1 3 4 5 5 6 7 20 25 30 30 v4 includes v1