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- #include <iostream>
- #include <vector>
- using namespace std;
- int main() {
- vector<int> v; //only int type
- v.push_back(1);
- v.push_back(2);
- v.push_back(3);
- for(int i=0; i<v.size(); i++)
- cout<<v[i]<<" "; //1 2 3
- cout<<endl;
- v[0] = 9;
- int n = v[2];
- v.at(2) = 7;
- for(int i=0; i<v.size(); i++)
- cout<<v[i]<<" ";
- cout<<endl; //9 2 7
- }
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