How to Append a Vector to another Vector in C++ - Step by Step Examples

How to Append a Vector to another Vector in C++ ?

Answer

To append a vector to another vector in C++, you can use the `insert` method, `push_back` method, or range constructor.


✐ Examples

1 Append Vector to Another Vector using insert() method

In this example,

  1. We create two vectors named vector1 and vector2 with different values.
  2. We use the insert method on vector1, passing the iterator pointing to the end of vector1 and the iterators of vector2.
  3. The insert method inserts all elements from vector2 into vector1 at the position indicated by the iterator.
  4. Finally, we print vector1 to standard output.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> vector1 = {1, 2, 3, 4};
    std::vector<int> vector2 = {5, 6, 7};
    vector1.insert(vector1.end(), vector2.begin(), vector2.end());
    for (int num : vector1) {
        std::cout << num << " ";
    }
    return 0;
}

Output

1 2 3 4 5 6 7

2 Append Vector to Another Vector using push_back() method

In this example,

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

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> vector1 = {1, 2, 3, 4};
    std::vector<int> vector2 = {5, 6, 7};
    for (int num : vector2) {
        vector1.push_back(num);
    }
    for (int num : vector1) {
        std::cout << num << " ";
    }
    return 0;
}

Output

1 2 3 4 5 6 7

3 Append Vector to Another Vector using range constructor

In this example,

  1. We create two vectors named vector1 and vector2 with different values.
  2. We use the range constructor by passing the iterators of vector2 to vector1 constructor.
  3. The range constructor appends all elements from vector2 to vector1.
  4. Finally, we print vector1 to standard output.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> vector1 = {1, 2, 3, 4};
    std::vector<int> vector2 = {5, 6, 7};
    vector1.insert(vector1.end(), vector2.begin(), vector2.end());
    for (int num : vector1) {
        std::cout << num << " ";
    }
    return 0;
}

Output

1 2 3 4 5 6 7

Summary

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


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  11. How to get First Item in a Vector in C++ ?
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  15. How to Iterate Over a Vector in Reverse Order in C++ ?
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  23. How to find the Item with Maximum Number of Occurrences in a Vector in C++ ?
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  26. How to Sort a Vector in Ascending Order in C++ ?
  27. How to Sort a Vector in Descending Order in C++ ?
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  29. How to Iterate over a Two Dimensional Vector in C++ ?
  30. How to create a Three Dimensional Vector in C++ ?
  31. How to Copy a Vector in C++ ?
  32. How to Split a Vector in C++ ?
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  36. How to Append a Vector to another Vector in C++ ?
  37. How to Concatenate Two Vectors in C++ ?
  38. How to check if Two Vectors are Equal in C++ ?
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  40. How to Convert a Vector of Integers to a Vector of Strings in C++ ?
  41. How to Convert a Vector of Strings to a Vector of Integers in C++ ?
  42. How to Convert a Vector of Floats to a Vector of Strings in C++ ?
  43. How to Convert a Vector of Strings to a Vector of Floats in C++ ?
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  54. How to Remove Items from Vector based on a Condition in C++ ?
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