first and last digit of a number in c++

To find the first and last digit of a number in C++, you can follow these steps:

1. Get the input number from the user.
2. Convert the number to a string using the to_string() function. This will allow us to access individual digits easily.
3. Retrieve the first digit by accessing the first character of the string.
4. Retrieve the last digit by accessing the last character of the string.
5. Convert the first and last digits back to integers using the stoi() function if necessary.

Here is the code snippet that demonstrates this process:

#include <iostream>
#include <string>

int main() {
    int number;
    std::cout << "Enter a number: ";
    std::cin >> number;

    std::string numberString = std::to_string(number);

    int firstDigit = numberString[0] - '0';
    int lastDigit = numberString[numberString.length() - 1] - '0';

    std::cout << "First digit: " << firstDigit << std::endl;
    std::cout << "Last digit: " << lastDigit << std::endl;

    return 0;
}

In this code, we use the std::to_string() function to convert the number variable to a string. We then access the first digit by using numberString[0] and the last digit by using numberString[numberString.length() - 1]. The - '0' part is used to convert the characters to their integer equivalents. Finally, we output the first and last digits using std::cout.