为什么运行成功，停止运行后会报错：引发了异常: 读取访问权限冲突。 _Pnext 是 0xCCCCCCD0。

#include <iostream>
using namespace std;
#include <string>


struct Student {
	string name;
	int age;
};

struct teacher {
	string name;
	int age;
	struct Student stu;  //结构体Student类型，需要在teacher前定义
};

int main() {
	struct teacher t1;
	//= {
	//	"alice",
	//	30,
	//	{"bob",12}
	//}
	t1.name = "alice";
	t1.age = 30;
	t1.stu.name = "bob";
	t1.stu.age = 12;
	cout << "teacher's name= " << t1.name 
		<< " teacher'age= " << t1.age 
		<< " student'sname= " << t1.stu.name 
		<< " student's age= " << t1.stu.age << endl;

	system("pause");
	return 0;
}