Chapter 10: Problem 17
Explain what publ ic: and private: do in a class definition. In particular, explain why we do not just make everything public: and save difficulty in access.
Chapter 10: Problem 17
Explain what publ ic: and private: do in a class definition. In particular, explain why we do not just make everything public: and save difficulty in access.
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Get started for freeGive a function definition corresponding to the following function declaration. (The type ShoeType is given in Self-Test Exercise \(2 .)\) ShoeType discount(ShoeType old_record); //Returns a structure that is the same as its argument, //but with the price reduced by \(10 \%\).
(This exercise is for those who have studied the optional section on default
arguments.) What output does the following function provide in response to the
following calls?
void func (double \(x,\) double \(y=1.1,\) double \(z=2.3\) ) \\{
cout \(<
Define a function called copy_char that takes one argument that is an input stream. When called, copy_char will read one character of input from the input stream given as its argument and will write that character to the screen. You should be able to call your function using either cin or an input-file stream as the argument to your function copy_char. (If the argument is an input-file stream, then the stream is connected to a file before the function is called, so copy_char will not open or close any files.) For example, the first of the following two calls to copy_char will copy a character from the file stuff. dat to the screen, and the second will copy a character from the keyboard to the screen: ifstream fin; fin.open("stuff.dat") copy_char(fin) copy_char(cin)
Given the following class definition, write an appropriate definition for the member function set: class Temperature \\{ public: void set(double new_degrees, char new_scale); //Sets the member variables to the values given as / / arguments. double degrees; char scale; //'F' for Fahrenheit or 'C' for Celsius. \\};
Give a definition for the function with the following function declaration. The class BankAccount is defined in Display 10.5 double difference(BankAccount account1, BankAccount account2); / / Precondition: account1 and account2 have been given values // (that is, their member variables have been given values). // Returns the balance in account1 minus the balance in account2.
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