How to Copy a Vector in C++ - Step by Step Examples

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How to Copy a Vector in C++ ?

Answer

In C++, you can copy a vector by using the copy constructor or by using the assignment operator.

✐ Examples

1 Copy a Vector using Copy Constructor

In this example,

We create a vector named originalVector with some values.
We use the copy constructor to create an independent copy named copiedVector.
Any modifications made to originalVector will not affect copiedVector.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> originalVector = {1, 2, 3, 4, 5};
    std::vector<int> copiedVector(originalVector);
    std::cout << "Original vector: ";
    for (int num : originalVector) {
        std::cout << num << " ";
    }
    std::cout << "\n";
    std::cout << "Copied vector: ";
    for (int num : copiedVector) {
        std::cout << num << " ";
    }
    std::cout << "\n";
    return 0;
}

Output

Original vector: 1 2 3 4 5
Copied vector: 1 2 3 4 5

2 Copy a Vector using Assignment Operator

In this example,

We create a vector named originalVector with some values.
We assign originalVector to copiedVector using the assignment operator (=).
Any modifications made to originalVector will not affect copiedVector.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> originalVector = {1, 2, 3, 4, 5};
    std::vector<int> copiedVector = originalVector;
    std::cout << "Original vector: ";
    for (int num : originalVector) {
        std::cout << num << " ";
    }
    std::cout << "\n";
    std::cout << "Copied vector: ";
    for (int num : copiedVector) {
        std::cout << num << " ";
    }
    std::cout << "\n";
    return 0;
}

Output

Original vector: 1 2 3 4 5
Copied vector: 1 2 3 4 5

Summary

In this tutorial, we learned How to Copy a Vector in C++ language with well detailed examples.

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How to Copy a Vector in C++ - Step by Step Examples

How to Copy a Vector in C++ ?

Answer

✐ Examples

1 Copy a Vector using Copy Constructor

C++ Program

Output

2 Copy a Vector using Assignment Operator

C++ Program

Output

Summary

More C++ Vectors Tutorials