A simple program to ask the user to give any number and then the program will find the first and last digit using C++ programming language.

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Program Listing

#include <iostream>

// first_last.cpp
// Jake Rodriguez Pomperada, MAED-IT, MIT
// jakerpomperada.com and jakerpomperada.blogspot.com
// jakerpomperada@gmail.com
// Bacolod City, Negros Occidental Philippines
// April 16, 2022  7:03 AM    Saturday

int main()
            int num_val = 0;
            int last = 0;
            std::cout << "\n";
            std::cout << "\tFirst and Last Number in C++";
            std::cout << "\n\n";
            std::cout << "\tGive any number: ";
            std::cin >> num_val;
            last = num_val % 10;

            while (num_val >= 10)
                num_val = num_val / 10;

           std::cout << "\n";
           std::cout << "\tThe first digit : " << num_val;
           std::cout << "\n\n";
           std::cout << "\tThe last digit  : " << last;
           std::cout << "\n\n";
           std::cout << "\tEnd of Program";
           std::cout << "\n";