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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class Animal {
  5.   public:
  6.   Animal() {}
  7. };
  8.  
  9. class Cat: public Animal {
  10.   public:
  11.   int someThing;
  12.  
  13.   Cat(): Animal() {
  14.     this->someThing = 42;
  15.   }
  16. };
  17.  
  18. int main() {
  19.   // Cat* a = new Cat(); // Works
  20.   Animal* a = new Cat(); // Does not work
  21.   cout << a->someThing << endl;
  22.  
  23.   return 0;
  24. }
Compilation error #stdin compilation error #stdout 0s 16064KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:21:14: error: ‘class Animal’ has no member named ‘someThing’
   cout << a->someThing << endl;
              ^~~~~~~~~
stdout
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Standard output is empty
https://ideone.com/i9SjfW
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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