How to Concatenate Two Vectors in C++ - Step by Step Examples

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How to Concatenate Two Vectors in C++ ?

Answer

To concatenate two vectors in C++, you can use the `insert` method, `push_back` method, or range constructor.

✐ Examples

1 Concatenate Numeric Vectors using insert() method

In this example,

We create two vectors named vector1 and vector2.
We use the insert method on vector1, passing the iterators of vector2.
The insert method inserts all elements from vector2 into vector1 at the end of vector1.
Finally, we print vector1 to standard output.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> vector1 = {1, 2, 3};
    std::vector<int> vector2 = {4, 5, 6};
    vector1.insert(vector1.end(), vector2.begin(), vector2.end());
    for (int num : vector1) {
        std::cout << num << " ";
    }
    return 0;
}

Output

1 2 3 4 5 6

2 Concatenate Character Vectors using push_back() method

In this example,

We create two vectors named vector1 and vector2.
We use the push_back method on each element of vector2 to append them to vector1.
The push_back method adds each element from vector2 to the end of vector1.
Finally, we print vector1 to standard output.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<char> vector1 = {'a', 'b', 'c'};
    std::vector<char> vector2 = {'d', 'e', 'f'};
    for (char ch : vector2) {
        vector1.push_back(ch);
    }
    for (char ch : vector1) {
        std::cout << ch << " ";
    }
    return 0;
}

Output

a b c d e f

Summary

In this tutorial, we learned How to Concatenate Two Vectors in C++ language with well detailed examples.

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How to Concatenate Two Vectors in C++ - Step by Step Examples

How to Concatenate Two Vectors in C++ ?

Answer

✐ Examples

1 Concatenate Numeric Vectors using insert() method

C++ Program

Output

2 Concatenate Character Vectors using push_back() method

C++ Program

Output

Summary

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