Rewrite the bookstore program from § 7.1.1 (p. 256) to read its transactions from a file....

Rewrite the bookstore program from § 7.1.1 (p. 256) to read its transactions from a file. Pass the name of the file as an argument to main (§ 6.2.5, p. 218).

§ 7.1.1 (p. 256)

Exercise 7.1

Write a version of the transaction-processing program from § 1.6 (p. 24) using the Sales_data class you defined for the exercises in § 2.6.1 (p. 72).

§ 1.6 (p. 24)

Exercise 1.25

Using the Sales_item.h header from the Web site, compile and execute the bookstore program presented in this section.

§ 2.6.1 (p. 72)

Exercise 2.36

In the following code, determine the type of each variable and the value each variable has when the code finishes:

int a = 3, b = 4;decltype(a) c = a;decltype((b)) d = a;++c;++d;

Exercise 2.37

Assignment is an example of an expression that yields a reference type. The type is a reference to the type of the left-hand operand. That is, if i is an int, then the type of the expression i = x is int&. Using that knowledge, determine the type and value of each variable in this code:

int a = 3, b = 4;decltype(a) c = a;decltype(a = b) d = a;

§ 6.2.5, p. 218

Exercise 6.25

Write a main function that takes two arguments. Concatenate the supplied arguments and print the resulting string.

Exercise 6.26

Write a program that accepts the options presented in this section. Print the values of the arguments passed to main.