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  1. #include <iostream>
  2. using namespace std;
  3. class Txtbin {
  4. public:
  5.     const static int ERR_EMPTY_IMAGE   = 2;   
  6. };
  7. class Test1 {
  8. public:
  9.     const  int ERR_EMPTY_IMAGE   = 2; 
  10.     Test1() = default; 
  11.     Test1(int x) : ERR_EMPTY_IMAGE{x} {}
  12. };
  13. class Test2 {
  14. public:
  15.     const  int ERR_EMPTY_IMAGE;    
  16.     Test2(int x) : ERR_EMPTY_IMAGE{x} {}
  17. };
  18.  
  19. int main() {
  20. 	Txtbin a;
  21.     int err; 
  22.     Test1 b;  
  23.     Test1 b_ouch(9); 
  24.     Test2 c(5), d(6); 
  25.  
  26.     switch(err){
  27.         case Txtbin::ERR_EMPTY_IMAGE:      // no need for an object
  28.             std::cerr << "Error: Image is empty\n" << std::endl;
  29.             break;
  30.     }	
  31.     switch(err){
  32.         case a.ERR_EMPTY_IMAGE:            // but the object doesn't bother
  33.             std::cerr << "Error: Image is empty\n" << std::endl;
  34.             break;
  35.     }	
  36.  
  37.     cout << "Sizeof a: "<< sizeof(a) <<endl;  // only static but minimum size is 1. 
  38.     cout << "Sizeof b: "<< sizeof(b) <<endl;  // with non static const 
  39.     cout << "Test2 c ->"<< c.ERR_EMPTY_IMAGE<<" d->"<< d.ERR_EMPTY_IMAGE<<endl; 
  40.     cout << "Test1 b ->"<< b.ERR_EMPTY_IMAGE<<" b_ouch->"<< b_ouch.ERR_EMPTY_IMAGE<<endl; 
  41.  
  42. 	return 0;
  43. }
Success #stdin #stdout 0.01s 5276KB
comments (?)
stdin 
Standard input is empty
stdout 
Sizeof a: 1
Sizeof b: 4
Test2 c ->5 d->6
Test1 b ->2 b_ouch->9
https://ideone.com/iRpdM4
Cp
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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