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  1. #include <stdio.h>
  2.  
  3. struct bytes10
  4. {
  5. 	~bytes10() { printf("dtor %p", this); }
  6. 	char _[10];
  7. };
  8.  
  9. int main()
  10. {
  11. 	size_t size1 = ((size_t*)new int[10])[-1];
  12. 	printf("%zu (0x%zx)\n", size1, size1);
  13. 	printf("%zu\n", ((size_t*)new bytes10[5])[-1]);
  14. 	printf("%zu\n", ((size_t*)new bytes10[6])[-1]);
  15. 	printf("%zu\n", ((size_t*)new bytes10[7])[-1]);
  16. 	printf("%zu\n", ((size_t*)new bytes10[65536])[-1]);
  17. 	return 0;
  18. }
Success #stdin #stdout 0s 5524KB
comments (?)
stdin 
Standard input is empty
stdout 
49 (0x31)
5
6
7
65536
https://ideone.com/Z0Sta1
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

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