測試通過（編譯器為gcc-3.4.5):
#include
#include
int main(){
class Book{
public:
long number;
float price;
char *bookname;
void display(){
printf("The name of this book is:%s\n",bookname);
printf("The price of this book is:%f
dolars\n",price);
printf("The number of such book is:%d\n",number);
}
void restore(){
number++;
}
void borrow(){
number--;
}
};
Book b;
b.bookname="Harry Potter";
b.price=18.00;
b.number=100;
b.display();
b.borrow();
b.display();
b.restore();
b.display();
system("pause");
return 0;
}