void add(book a[20],int &num);
void sum(book a[20],const int &sum);
void mostexpensive(book a[20],const int &num);
void putdown(book a[20],int &num);
void exit ();

#include <iostream>
using namespace std;
int main ()
{
bool flag = 1;
while ( flag )
{
int choice;

book basket[20];
int n = 0;

cout << "选择一下功能\\n1.添加一本书.\\n2.放下一本书.\\n3.查询最贵的书.\\n4.查询当前书篮中书的总价.\\n5.退出\\n";
do
{
cin >> choice;
}
while (choice < 1 || choice > 5);
switch ( choice )
{
case 1:add(basket,n); break;
case 2:putdown(basket,n); break;
case 3:mostexpensive(basket,n); break;
case 4:sum(basket,n); break;
case 5:flag = 0; break;
default:cout << "error!!!!";
}
}
return 0;
}

void add(book a[20],int &num)
{
cout << "输入书的名字，ID，价格，出版日期。\\n";
cin >> a[num].name >> a[num].ID >> a[num].price >> a[num].publicdate.year >> a[num].publicdate.month >> a[num].publicdate.day;
num ++;
}

void putdown(book a[20],int &num)
{
char bookname[20];
bool flag = false;
int i,j,k;

cout << "输入书的名字\\n";
cin >> bookname;

for (i=0;i<num&&(!flag);i++)
{
for (k=0;k<20;k++)  
{
if (bookname[k] == a[i].name[k]) //if (strcmp(bookname , a[i].name ) == 0)
{
flag = true;

}
else {flag = false;
break;}
}
}
if (flag)
{
for ( j = i; j < 20; j-- )
a[j] = a [j+1];
num --;
}
else
cout << "您并没有选择过该书！\\n";
}

void mostexpensive(book a[20],const int &num)
{
int i;
int max,m;
cout << "查询出最贵的书。\\n";
max = a[0].price;

for ( i = 1; i < num; i++)
{
if (a[i].price > max)
{
m = i;
max = a[i].price;
}
}
cout << "名字:" << a[m].name << "ID:" << a[m].ID << "价格:" << a[m].price
<< "出版日期:" << a[m].publicdate.year << "-" << a[m].publicdate.month
<< "-" << a[m].publicdate.day;

}

void sum(book a[20],const int &num)
{
int i;
int booksum = 0;
for ( i= 0; i < num; i++)
{
booksum = booksum + a[i].price;
}
cout << booksum;
}
怎么运行的有问题

buy cheap wow gold
wow gold for sale
buying wow gold
world of warcraft power leveling
buy wow leveling
wotlk powerleveling
buy cheap wow power leveling
wow gold
buy wow gold
cheapest wow gold
world of warcraft gold
wow powerleveling
buy world of warcraft power leveling
wotlk power leveling
wow leveling

So what can wow power leveling you do right now to make progress and get your book done? Start with one small wow power leveling thing. Pull out your calendar and schedule an hour of writing time. Take twenty minutes to brainstorm aion power level everything you want to cover in your book. Flip to a fresh page in your journal, let wow power leveling your imagination go, and free-write your big vision for your book-including celebrity endorsements, national aion powerleveling TV appearances, and raving book reviews. One respondent even said she'd aion powerleveling never had a shortage of clients since writing and publishing her book. These cheap aion power leveling statistics have been out for a year or so, but they're still amazing! Particularly wow power leveling when self-employed professionals, coaches, and consultants are buy wow gold looking for ways ensure long-term success for their business.