Question

How to insert multiple elements at a given position in a vector with C++

Answer 1

#include <iostream>
#include <vector>

int main() {
    std::vector<int> v = {1, 2, 3, 7, 8};

    // Elements to insert
    std::vector<int> newElements = {4, 5, 6};

    // Insert before position 3 (before element '7')
    v.insert(v.begin() + 3, newElements.begin(), newElements.end());

    for (int x : v) {
        std::cout << x << " ";
    }
}



/*
run:

1 2 3 4 5 6 7 8 

*/

 

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Answer 2

#include <iostream>
#include <vector>

int main() {
    std::vector<int> v = {1, 2, 3, 7, 8};

    // Insert multiple elements directly
    v.insert(v.begin() + 3, {4, 5, 6});

    for (int x : v) {
        std::cout << x << " ";
    }
}



/*
run:

1 2 3 4 5 6 7 8 

*/

 

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