拷贝字符串，找地址，把地址赋给指针变量，创建字符串结构体

#include 
#include 
struct book
{
	char name[30];
	short price;
};
int main()
{
	struct book a = {"研究生录取通知书",10};
	struct book* pb = &a;
	printf("name of book = %sn",pb->name);//用指针变量来找a的名字
	printf("price of book = %dn",pb->price);//用指针变量来找a的名字
	printf("name of book = %sn",a.name);//用‘.’来找a的名字
	printf("price of book = %dn",a.price);
	printf("name of book = %sn",(*pb).name);//(*pb)等价于结构体a
	printf("price of book = %dn",(*pb).price);
	strcpy(a.name,"c++");
	printf("%sn",a.name);
	return 0;
}