How to get Sub Vector in C++ - Step by Step Examples

How to get Sub Vector in C++ ?

Answer

To get a sub-vector in C++, you can use iterators or the std::vector's begin() and end() functions with appropriate indices.

✐ Examples

1 Get Sub-Vector of Index Range [1, 3)

In this example,

We have a vector named vec containing elements.
We use the std::vector's begin() and end() functions with appropriate indices to create iterators.
We use the std::vector's constructor that accepts iterators to create a new sub-vector named sub_vec.
Finally, we print the sub-vector sub_vec to standard output.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5};
    std::vector<int> sub_vec(vec.begin() + 1, vec.begin() + 3);
    for (int x : sub_vec) {
        std::cout << x << " ";
    }
    return 0;
}

Output

2 3

2 Get Sub-Vector of Index Range [1, 5)

In this example,

We have a vector named vec containing elements.
We use the std::vector's begin() and end() functions with appropriate indices to create iterators.
We use the std::vector's constructor that accepts iterators to create a new sub-vector named sub_vec.
Finally, we print the sub-vector sub_vec to standard output.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5};
    std::vector<int> sub_vec(vec.begin() + 1, vec.end());
    for (int x : sub_vec) {
        std::cout << x << " ";
    }
    return 0;
}

Output

2 3 4 5

Summary

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

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How to get Sub Vector in C++ - Step by Step Examples

How to get Sub Vector in C++ ?

Answer

✐ Examples

1 Get Sub-Vector of Index Range [1, 3)

C++ Program

Output

2 Get Sub-Vector of Index Range [1, 5)

C++ Program

Output

Summary

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