functionname(&tensplace, &onesplace, userint);
The assignment was to write a function call so I assumed the syntax of the function. The sample output of the program was not given, so I assumed this did not mater. I also assumed the functions name and that the language was C++.
A function is called by it's name with the arguments as a comma separated list inside parentheses. A & is used to denote the address of in C++. &tensplace and &onesplace gives a pointer to the variables tensplace and ones place. userint is passed by value.