Remove the jth object from the subset

#include <iostream>
#include <vector>

void removeJthObject(std::vector<int> &subset, int j) {
    subset.erase(subset.begin() + j);
}

int main() {
    std::vector<int> subset = {1, 2, 3, 4, 5};
    int j = 2; // Remove the 3rd element (0-based index)

    std::cout << "Subset before removal: ";
    for (int num : subset) {
        std::cout << num << " ";
    }
    std::cout << std::endl;

    removeJthObject(subset, j);

    std::cout << "Subset after removing element at index " << j << ": ";
    for (int num : subset) {
        std::cout << num << " ";
    }
    std::cout << std::endl;

    return 0;
}

Explanation:

1. #include <iostream> and #include <vector>: Including necessary header files for input-output operations and using vectors.
2. void removeJthObject(std::vector<int> &subset, int j): Declaring a function removeJthObject that takes a reference to a vector of integers (subset) and an integer (j) as parameters. This function removes the jth element from the subset.
3. subset.erase(subset.begin() + j);: Inside the removeJthObject function, the erase function is used to remove the element at index j from the subset vector.
4. int main() { / ... / }: The main function where the program execution begins.
5. std::vector<int> subset = {1, 2, 3, 4, 5};: Initializing a vector named subset with integers 1, 2, 3, 4, and 5.
6. int j = 2;: Assigning the value 2 to the variable j, indicating the index of the element to be removed (0-based index).
7. Printing the elements of the subset vector before the removal operation.
8. removeJthObject(subset, j);: Calling the removeJthObject function to remove the jth element from the subset vector.
9. Printing the elements of the subset vector after the removal operation at index j.

This code demonstrates how to remove the jth object (element at index j) from a subset represented as a vector in C++.