hi all again, i need one of my functions to call another function. im using references and prototypes, so i put all the references the function called needed in the function calling it. and obviously the prototype of the functin called within the calling function. however i get this error;

E:\Computing Coursework\Computing Coursework.cpp In function `void Order_Quote(Vehicle_Struct*, int&, Customer_Struct*, int&, Order_Struct*, int&)':

317 E:\Computing Coursework\Computing Coursework.cpp `Order_Part' cannot be used as a function