Write a program that can make these calculations for arbitrary purchases and sales of shares in a portfolio. The user enters commands buy symbol quantity price, sell symbol quantity price (which causes the gain on that transaction to be displayed), and quit. Hint: Keep a Map that manages a separate queue for each stock symbol.

Avariable definition defines the name of a variable that will be used in a program, as well as

Consider the following statements: struct nametype{string first; string last; }; struct coursetype{string name; int callnum; int credits; char grade; }; struct studenttype{nametype name; double gpa; coursetype course; }; studenttype student; studenttype classlist[100]; coursetype course; nametype name; mark the following statements as valid or invalid. if a statement is invalid, explain why. a.) student. course. callnum = "csc230"; b.) cin > > student. name; c.) classlist[0] = name; d.) classlist[1].gpa = 3.45; e.) name = classlist[15].name; f.) student. name = name; g.) cout < < classlist[10] < < endl; h.) for (int j = 0; j < 100; j++)classlist[j].name = name; i.) classlist. course. credits = 3; j.) course = studenttype. course;

State 7 common key's for every keyboard