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  1. #include <stdio.h>
  2.  
  3. #define COUNT 5
  4. typedef int(&DEF_ARRAY)[COUNT];
  5. class A
  6. {
  7. public:
  8. 	int m_Array[COUNT];
  9. 	/* error
  10. 	int(&)[COUNT] GetArray( void ) { return m_Array; }
  11. 	*/
  12. 	A()
  13. 	{
  14. 		for( int i=0; i<int(sizeof( m_Array )/sizeof( m_Array[0] )); ++i )
  15. 		{
  16. 			m_Array[i] = i;
  17. 		}		
  18. 	}
  19. 	DEF_ARRAY GetArray( void ) { return m_Array; }
  20. };
  21.  
  22. void ReceiveArray( int array[COUNT] )
  23. {
  24. 	printf( "%d / %d\n", sizeof( array[0] ), sizeof( array ) );
  25. 	for( int i=0; i<int(sizeof( array )/sizeof( array[0] )); ++i )
  26. 	{
  27. 		printf( "  [%d] %d\n", i, array[i] );
  28. 	}
  29. }
  30. void ReceiveArrayRef( int(&array)[COUNT] )
  31. {
  32. 	printf( "%d / %d\n", sizeof( array[0] ), sizeof( array ) );
  33. 	for( int i=0; i<int(sizeof( array )/sizeof( array[0] )); ++i )
  34. 	{
  35. 		printf( "  [%d] %d\n", i, array[i] );
  36. 	}
  37. }
  38.  
  39. int main( void )
  40. {
  41. 	A a;
  42. 	/* error
  43. 	int array[COUNT] = a.GetArray();
  44. 	*/
  45. 	int (&arrayRef)[COUNT] = a.GetArray();
  46. 	puts( "a.m_Array" ); ReceiveArray( a.m_Array );
  47. 	puts( "a.m_Array" ); ReceiveArrayRef( a.m_Array );
  48.     puts( "arrayRef"  ); ReceiveArrayRef( arrayRef );
  49.     arrayRef[2] = 99;
  50. 	puts( "a.m_Array" ); ReceiveArrayRef( a.m_Array );
  51.     puts( "arrayRef"  ); ReceiveArrayRef( arrayRef );
  52.     return 0;
  53. }
Success #stdin #stdout 0s 3340KB
comments (?)
stdin
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Standard input is empty
stdout
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a.m_Array
4 / 4
  [0] 0
a.m_Array
4 / 20
  [0] 0
  [1] 1
  [2] 2
  [3] 3
  [4] 4
arrayRef
4 / 20
  [0] 0
  [1] 1
  [2] 2
  [3] 3
  [4] 4
a.m_Array
4 / 20
  [0] 0
  [1] 1
  [2] 99
  [3] 3
  [4] 4
arrayRef
4 / 20
  [0] 0
  [1] 1
  [2] 99
  [3] 3
  [4] 4
https://ideone.com/RJd1WV
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
secret

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