forked from jieniyimiao/CppPrimer
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ex14_02.cpp
47 lines (41 loc) · 1002 Bytes
/
ex14_02.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
//
// ex14_02.cpp
// Exercise 14.2
//
// Created by pezy on 3/9/15.
// Copyright (c) 2014 pezy. All rights reserved.
//
// @Brief implementation of class Sales_data
// @See ex14_02.h
#include "ex14_02.h"
Sales_data::Sales_data(std::istream &is) : Sales_data()
{
is >> *this;
}
Sales_data& Sales_data::operator+=(const Sales_data &rhs)
{
units_sold += rhs.units_sold;
revenue += rhs.revenue;
return *this;
}
std::istream& operator>>(std::istream &is, Sales_data &item)
{
double price = 0.0;
is >> item.bookNo >> item.units_sold >> price;
if (is)
item.revenue = price * item.units_sold;
else
item = Sales_data();
return is;
}
std::ostream& operator<<(std::ostream &os, const Sales_data &item)
{
os << item.isbn() << " " << item.units_sold << " " << item.revenue << " " << item.avg_price();
return os;
}
Sales_data operator+(const Sales_data &lhs, const Sales_data &rhs)
{
Sales_data sum = lhs;
sum += rhs;
return sum;
}