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

How to get Sub List in C++ ?

Answer

To get a sublist in C++ using std::list, you can use iterators to specify the range of elements.


✐ Examples

1 Get Sublist from a List with Elements

In this example,

  1. We create a list named myList with some elements.
  2. We use iterators to specify the range of elements for the sublist. The range is defined by the starting iterator (inclusive) and the ending iterator (exclusive).
  3. We create the sublist by constructing a new list with the specified range of elements.
  4. We print the elements of the sublist to standard output.

C++ Program

#include <iostream>
#include <list>

int main() {
    std::list<int> myList = {1, 2, 3, 4, 5};
    auto start = std::next(myList.begin(), 1);
    auto end = std::next(myList.begin(), 4);
    std::list<int> subList(start, end);
    
    std::cout << "Sublist: ";
    for (int val : subList) {
        std::cout << val << " ";
    }
    return 0;
}

Output

Sublist: 2 3 4

2 Get Sublist from Another List with Different Indices

In this example,

  1. We create a list named myList with some elements.
  2. We use iterators to specify the range of elements for the sublist. The range is defined by the starting iterator (inclusive) and the ending iterator (exclusive).
  3. We create the sublist by constructing a new list with the specified range of elements.
  4. We print the elements of the sublist to standard output.

C++ Program

#include <iostream>
#include <list>

int main() {
    std::list<int> myList = {10, 20, 30, 40, 50, 60};
    auto start = std::next(myList.begin(), 2);
    auto end = std::next(myList.begin(), 5);
    std::list<int> subList(start, end);
    
    std::cout << "Sublist: ";
    for (int val : subList) {
        std::cout << val << " ";
    }
    return 0;
}

Output

Sublist: 30 40 50

Summary

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


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