Answer:
void DisplayStats(string fName, int num1, double examScore);
Step-by-step explanation:
Using C++ programming language.
Function headers (signatures) are allowed to be placed on top just before the main method in C++ indicating that the function's definition will be provided down below the main method, thereby allowing you to call the function within the main function.
The requirements of the the question are met. The function signature above indicates that it is void (wont return any value), The name is DisplayStats, and the parameter list are separated by single spaces as required with the correct data types.