vector

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#include <iostream> #include<vector> using namespace std; int main() { vector<int> v={12,13,14,15}; cout<<"initial vector:"<<endl; for(int i:v) cout<<i<<endl; v.push_back(100); v.push_back(200); cout<<"after adding two element,contents of vector are:\n"; for(int i:v) cout<<i<<endl; cout<<"elements at index 1:"<<v.at(1)<<endl; cout<<"elements at index 3:"<<v.at(3)<<endl; v.at(4)=700; cout<<"after updateing the contents of vector:"<<endl; for(int i:v) cout<<i<<endl; v.pop_back(); v.pop_back(); cout<<"after deleting an element contents of vector are:"<<endl; for (int i:v) cout<<i<<endl; cout<<v.empty(); if(v.empty()==0) cout<<" vector is not empty"; else cout<<"vector is empty"<<endl; cout<<v.size()<<endl; v.clear(); cout<<v.size(); for(int i:v) cout<<i<<endl; return 0; }