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  1. #include <iostream>
  2. using namespace std;
  3.  
  4.  
  5. class A {
  6. public:
  7.   A() {}
  8.   virtual ~A() {}
  9. };
  10. class B : public A {
  11. public:
  12.   B();
  13.   ~B();
  14. };
  15.  
  16. class C {
  17. public:
  18.   C(B*b=0) : b(b) {}
  19.   ~C() { delete b; } 
  20. private:
  21.   B* b;
  22. };
  23.  
  24. int main() {
  25. 	C c(new B);
  26. 	return 0;
  27. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
/home/EQNC1e/ccWv1hVg.o: In function `main':
prog.cpp:(.text.startup+0x1d): undefined reference to `B::B()'
collect2: error: ld returned 1 exit status
stdout
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Standard output is empty
https://ideone.com/TNcb6u
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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