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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct A;
  5. struct B;
  6.  
  7. int main() {
  8. 	A* aptr;
  9. 	B* bptr;
  10. 	bptr = dynamic_cast<B*>(aptr);
  11. 	return 0;
  12. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:10:30: error: cannot dynamic_cast ‘aptr’ (of type ‘struct A*’) to type ‘struct B*’ (target is not pointer or reference to complete type)
  bptr = dynamic_cast<B*>(aptr);
                              ^
stdout
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Standard output is empty
https://ideone.com/66noSz
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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