Debug error abnormal program termination

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c++小甲鱼第37课，自己写的代码也出现abnormal program termination，小甲鱼的源代码编译也出现这个错误abnormal program termination

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小甲鱼课件的代码，我在VC下不能运行

1. #include <iostream>
   
2. #include <string>
   
3. 
   
4. class Company
   
5. {
   
6. public:
   
7.     Company(std::string theName, std::string product);
   
8.     virtual void printInfo();
   
9. 
   
10. protected:
    
11.     std::string name;
    
12.     std::string product;
    
13. };
    
14. 
    
15. class TechCompany : public Company
    
16. {
    
17. public:
    
18.     TechCompany(std::string theName, std::string product);
    
19.     virtual void printInfo();
    
20. };
    
21. 
    
22. Company::Company(std::string theName, std::string product)
    
23. {
    
24.     name = theName;
    
25.     this->product = product;
    
26. }
    
27. 
    
28. void Company::printInfo()
    
29. {
    
30.     std::cout << "这个公司的名字叫：" << name <<
    
31.     "正在生产" << product << "\n";
    
32. }
    
33. 
    
34. TechCompany::TechCompany(std::string theName, std::string product) : Company(theName, product)
    
35. {
    
36. }
    
37. 
    
38. void TechCompany::printInfo()
    
39. {
    
40.     std::cout << name << "公司大量生产了 " << product << "这款产品!\n";
    
41. }
    
42. 
    
43. int main()
    
44. {
    
45.     Company *company = new Company("APPLE", "Iphone");
    
46.     TechCompany *tecCompany = dynamic_cast<TechCompany *>(company);
    
47. 
    
48.     if( tecCompany != NULL )
    
49.     {
    
50.         std::cout << "成功!\n";
    
51.     }
    
52.     else
    
53.     {
    
54.         std::cout << "悲催!\n";
    
55.     }
    
56. 
    
57.     delete company;
    
58. 
    
59.     company = NULL;
    
60.     tecCompany = NULL;
    
61. 
    
62.     return 0;
    
63. }
    

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