What does & mean when it is used as part of a type declaration of a function parameter? The parameter is to be passed by value The parameter is to be passed by reference The parameter is declared to be a pointer The parameter's address cannot be modified by the function

Function Call Operator with code?

C++ Write a void function that has two parameters: a value parameter called num that receives a floating point number from the calling function and a floating point reference parameter called result. The functions should do this calculation: 25.0 * num + 37 and store the answer in result. Do not do any read or write operations in the function.

It is necessary to outline the regulations that apply to functions with default parameters.

What is the need for functions?