Write a program that gets a long number as input, exchanges the first and last digits of the number using a function, and displays the changed number in the main program. Ask the user for input...

I need help in coding the following practice problem using the fundamentals of C Programming Language without using arrays.

Extracted text: Write a program that gets a long number as input, exchanges the first and last digits of the number using a function, and displays the changed number in the main program. Ask the user for input numbers until a negative number is entered. Example: Enter decimal number: 193435 Output of the number: 593431