vector.assign

The `vector.assign` function is used to assign new values to a vector. It replaces the existing elements of the vector with the new set of elements provided as arguments.

Syntax:

vector.assign(count, value);
vector.assign(startIterator, endIterator);
vector.assign(initializerList);

Parameters:
- `count`: the number of elements to be inserted into the vector.
- `value`: the value to be assigned to each element being inserted into the vector.
- `startIterator`: an iterator pointing to the beginning of a range of elements to be inserted into the vector.
- `endIterator`: an iterator pointing to the end of a range of elements to be inserted into the vector.
- `initializerList`: an initializer list containing the elements to be inserted into the vector.

Return value:
None.

Example:

#include <iostream>
#include <vector>

using namespace std;

int main() {
    vector<int> vec;

    // Assigning 5 elements with value 10
    vec.assign(5, 10);

    // Displaying the elements of the vector
    for (int i = 0; i < vec.size(); i++) {
        cout << vec[i] << " ";
    }
    cout << endl;

    // Assigning elements from a range
    int arr[] = { 1, 2, 3, 4, 5 };
    vec.assign(arr, arr + 5);

    // Displaying the elements of the vector
    for (int i = 0; i < vec.size(); i++) {
        cout << vec[i] << " ";
    }
    cout << endl;

    // Assigning elements using an initializer list
    vec.assign({ 6, 7, 8, 9, 10 });

    // Displaying the elements of the vector
    for (int i = 0; i < vec.size(); i++) {
        cout << vec[i] << " ";
    }
    cout << endl;

    return 0;
}

Output:

10 10 10 10 10 
1 2 3 4 5 
6 7 8 9 10