C++ Exercises: From a list of positive integers, create a list of their rightmost digits

Last update on December 20 2024 12:27:59 (UTC/GMT +8 hours)

Create List of Rightmost Digits of Numbers in Array

Write a C++ program to create a list of the rightmost digits from a given list of positive integers.

Test Data:
({ 12, 20, 351, 4449}) -> {2, 0, 1, 9}

Sample Solution:

C++ Code :

#include <bits/stdc++.h>  // Includes all standard C++ libraries
#include <list>  // Includes the list container

using namespace std;  // Using standard namespace

// Function to create a new list with the rightmost digits of positive integers from the given list
list<int> test(list<int> nums) {
    list<int> new_list;  // Declare a new list to store modified elements
    list<int>::iterator it;  // Declare an iterator for traversing the input list 'nums'

    // Iterate through 'nums' list, extract the rightmost digit of each positive integer, and store in 'new_list'
    for (it = nums.begin(); it != nums.end(); ++it) {
        new_list.push_back(*it % 10);  // Extract the rightmost digit using the modulo operator
    }

    return new_list;  // Return the new list with the rightmost digits
}

// Function to display the elements of a list
display_list(list<int> g) {
    list<int>::iterator it;  // Declare an iterator for traversing the input list 'g'

    // Iterate through 'g' list and display each element
    for (it = g.begin(); it != g.end(); ++it) {
        cout << *it << ' ';  // Print each element followed by a space
    }
    cout << '\n';  // Move to a new line after displaying all elements
}

int main() {
    list<int> nums = {12, 20, 351 , 4449, 87654};  // Initialize a list 'nums' with positive integers
    cout << "Original list of elements:\n";
    display_list(nums);  // Display the original list 'nums'

    list<int> result_list;  // Declare a list to store the result of test() function
    result_list = test(nums);  // Call the test() function to extract rightmost digits
    cout << "\nNew list of the rightmost digits from \nthe said list of positive integers:\n";
    display_list(result_list);  // Display the new list with rightmost digits

    return 0;  // Return 0 to indicate successful completion of the program
}

Sample Output:

Original list of elements:
12 20 351 4449 87654

New list of the rightmost digits from
the said list of positive integers:
2 0 1 9 4

Flowchart:

C++ Code Editor:

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