How Can I Efficiently Concatenate Multiple std::vectors in C ?

Concatenating Multiple std::Vectors

Concatenating two or more std::vectors is a common task in C programming. Here's how you can do it:

Using the insert() Method

The insert() method allows you to insert elements at a specific position in a vector. To concatenate two vectors, insert the second vector at the end of the first vector as follows:

vector1.insert(vector1.end(), vector2.begin(), vector2.end());

This will append the elements of vector2 to the end of vector1, effectively concatenating the two vectors.

Example:

std::vector<int> vector1 {1, 2, 3};
std::vector<int> vector2 {4, 5, 6};

vector1.insert(vector1.end(), vector2.begin(), vector2.end());

std::cout << "Concatenated Vector: ";
for (int num : vector1) {
  std::cout << num << " ";
}

Output:

Concatenated Vector: 1 2 3 4 5 6

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