軟件設計-關於書店的一個小程序，c++寫的。.大家幫忙看看怎麼運行不了？？？

關於書店的一個小程序，c++寫的。.大家幫忙看看怎麼運行不了？？？

代碼可以在這兒粘貼
#include
#include
using namespace std;
class Sales_data
{
friend std::istream& operator>>(std::istream&, Sales_data&);
friend std::ostream& operator<<(std::ostream&, const Sales_data&);
friend bool operator < (const Sales_data&,const Sales_data&);
friend bool operator ==(const Sales_data&, const Sales_data&);
public:
Sales_data(){ default; }
Sales_data(const std::string &book) :bookNo(book){ }
Sales_data(std::istream &is) { is >> *this; }
public:
Sales_data& operator +=(const Sales_data&);
std::string isbn() const{ return bookNo; }
private:
std::string bookNo;
unsigned units_sold = 0;
double sellingprice = 0.0;
double saleprice = 0.0;
double discount = 0.0;
};
inline bool comparaIsbn(const Sales_data &lhs, const Sales_data &rhs)
{return lhs.isbn() == rhs.isbn();}

Sales_data operator + (const Salea_data&, const Salea_data&);

inline bool operator==(const Sales_data&lhs, const Sales_data&rhs)
{
return lhs.units_sold == rhs.units_sold&&
lhs.sellingprice == rhs.sellingprice&&
lhs.saleprice == rhs.saleprice&&
lhs.isbn() == rhs.isbn();
}
inline bool operator!=(const Sales_data&lhs, const Sales_data&rhs)
{
return!(lhs == rhs);
}
Sales_data& Sales_data::operator+=(const Sales_data&rhs)
{
units_sold += rhs.units_sold;
saleprice = (rhs.saleprice*rhs.units_sold + saleprice*units_sold)
/ (rhs.units_sold + units_sold);
if (sellingprice != 0)
discount = saleprice / sellingprice;
return *this;
}
Sales_data operator+(const Sales_data&lhs, const Sales_data&rhs)
{
Sales_data ret(lhs);
ret += rhs;
return ret;
}
std::istream&operator>>(std::istream& in, sales_data& s)
{
in >> s.bookNo >> s.units_sold >> s.sellingprice >> s.saleprice;
if (in && s.sellingprice != 0)
s.discount = s.saleprice / s.sellingprice;
else
s = Sales_data();
return in;
}
std::ostream& operator<<(std::ostream&out, const Sales_data&s)
{
out << s.isbn() << "" << s.units_sold << ""
<< s.sellingprice << "" << s.saleprice << "" << s.discount;
return out;
}
int main()
{
Sales_data book;
std::cout << "請輸入銷售記錄:" << std::endl;
while (std::cin >> book){
std::cout << "ISBN、售出本數、原始價格、實售價格、折扣為" << book <<
std::endl;
}
Sales_data trans1, trans2;
std::cout << "請輸入兩條ISBN相同的銷售記錄：" << std::endl;
std::cin >> trans1 >> trans2;
if (comparaIsbn(trans1, trans2))
std::cout << "匯總信息：ISBN、售出本數、原始價格、實售價格、折扣為"
<< trans1 + trans2 << std::endl;
else
std::cout << "兩條銷售記錄的ISBN不同" << std::endl;
Sales_data total, trans;
std::cout << "請輸入幾條ISBN相同的銷售記錄：" << std::endl;
if (std::cin >> total){
while (std::cin>>trans)
if (compareIsbn(total, trans))
total += trans;
else{
std::cout << "當前書籍ISBN不同" << std::endl;
break;
}
std::cout << "有效匯總信息：ISBN、售出本數、原始價格、實售價格、折扣為"
<< total << std::endl;
}
else{
std::cout << "沒有數據" << std::endl;
return -1;
}
int num = 1;
std::cout << "請輸入若干銷售記錄：" << std::endl;
if (std:; cin >> trans1){
while (std::cin>>trans2)
if (comparaIsbn(trans1, trans2))
num++;
else{
std::cout << trans1.isbn() << "共有"
<< num << "條銷售記錄" << std::endl;
trans1 == trans2;
num = 1;
}
std::cout << trans1.isbn() << "共有"
<< num << "條銷售記錄" << std::endl;
}
else{
std::cout << "沒有數據" << std::endl;
return -1;
}
return 0;
}

最佳回答：

 #include <iostream>
#include <sstream>

using namespace std;
class Sales_data
{
    friend std::istream& operator>>(std::istream&, Sales_data&);
    friend std::ostream& operator<<(std::ostream&, const Sales_data&);
    friend bool operator < (const Sales_data&, const Sales_data&);
    friend bool operator ==(const Sales_data&, const Sales_data&);
public:
    Sales_data() = default;
    Sales_data(const std::string &book) : bookNo(book) { }
    Sales_data(std::istream &is) { is >> *this; }
public:
    Sales_data& operator +=(const Sales_data&);
    std::string isbn() const { return bookNo; }
private:
    std::string bookNo;
    unsigned units_sold = 0;
    double sellingprice = 0.0;
    double saleprice = 0.0;
    double discount = 0.0;
};
    inline bool comparaIsbn(const Sales_data &lhs, const Sales_data &rhs)
    {return lhs.isbn() == rhs.isbn();}
    Sales_data operator+ (const Sales_data& lhs, const Sales_data& rhs);
    inline bool operator==(const Sales_data& lhs, const Sales_data& rhs)
    {
        return lhs.units_sold == rhs.units_sold &&
               lhs.sellingprice == rhs.sellingprice &&
               lhs.saleprice == rhs.saleprice &&
               lhs.isbn() == rhs.isbn();
    }
    inline bool operator!=(const Sales_data& lhs, const Sales_data& rhs)
    {
        return!(lhs == rhs);
    }

Sales_data& Sales_data::operator+=(const Sales_data& rhs)
{
    units_sold += rhs.units_sold;
    saleprice = (rhs.saleprice * rhs.units_sold + saleprice * units_sold)
                / (rhs.units_sold + units_sold);
    if (sellingprice != 0)
        discount = saleprice / sellingprice;
    return *this;
}
Sales_data operator+(const Sales_data& lhs, const Sales_data& rhs)
{
    Sales_data ret(lhs);
    ret += rhs;
    return ret;
}
std::istream& operator>>(std::istream& in, Sales_data& s)
{
    in >> s.bookNo >> s.units_sold >> s.sellingprice >> s.saleprice;
    if (in && s.sellingprice != 0)
        s.discount = s.saleprice / s.sellingprice;
    else
        s = Sales_data();
    return in;
}
std::ostream& operator<<(std::ostream&out, const Sales_data&s)
{
    out << s.isbn() << "" << s.units_sold << ""
        << s.sellingprice << "" << s.saleprice << "" << s.discount;
    return out;
}
int main()
{
    Sales_data book;
    std::cout << "請輸入銷售記錄:" << std::endl;
    while (std::cin >> book) {
        std::cout << "ISBN、售出本數、原始價格、實售價格、折扣為" << book <<
                  std::endl;
    }
    Sales_data trans1, trans2;
    std::cout << "請輸入兩條ISBN相同的銷售記錄：" << std::endl;
    std::cin >> trans1 >> trans2;
    if (comparaIsbn(trans1, trans2))
        std::cout << "匯總信息：ISBN、售出本數、原始價格、實售價格、折扣為"
                  << trans1 + trans2 << std::endl;
    else
        std::cout << "兩條銷售記錄的ISBN不同" << std::endl;
    Sales_data total, trans;
    std::cout << "請輸入幾條ISBN相同的銷售記錄：" << std::endl;
    if (std::cin >> total) {
        while (std::cin >> trans)
            if (comparaIsbn(total, trans))
                total += trans;
            else {
                std::cout << "當前書籍ISBN不同" << std::endl;
                break;
            }
        std::cout << "有效匯總信息：ISBN、售出本數、原始價格、實售價格、折扣為"
                  << total << std::endl;
    }
    else {
        std::cout << "沒有數據" << std::endl;
        return -1;
    }
    int num = 1;
    std::cout << "請輸入若干銷售記錄：" << std::endl;
    if (std:: cin >> trans1) {
        while (std::cin >> trans2)
            if (comparaIsbn(trans1, trans2))
                num++;
            else {
                std::cout << trans1.isbn() << "共有"
                          << num << "條銷售記錄" << std::endl;
                trans1 == trans2;
                num = 1;
            }
        std::cout << trans1.isbn() << "共有"
                  << num << "條銷售記錄" << std::endl;
    }
    else {
        std::cout << "沒有數據" << std::endl;
        return -1;
    }
    return 0;
}

把格式簡單整理了下，都是些很低級的錯誤，單詞拼錯什麼的，樓主連這點耐心都沒有，還是不要寫代碼了。