/*PROGRAM DISCOUNT DENGAN FUNGSI*/#include<conio.h>#include<iostream.h>#pragma argsused
double price;
double discount(double rp){ double disc=rp*20/100; price=rp-disc; cout<<"Discount : Rp "<<disc<<endl; cout<<"Harga setelah discount : Rp "<<price<<endl; } double sisauang(double pay){ double sisa=pay-price; cout<<"Sisa uang : Rp "<<sisa<<endl; } int...