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  1. #include <cstdio>
  2. #include <vector>
  3.  
  4. using namespace std;
  5.  
  6. template<class T>
  7. bool IsPtrInVector(const vector<T>& v, const T* ptr)
  8. {
  9. 	const T* begin = &v[0];
  10. 	const T* end = begin + v.size();
  11. 	return ptr >= begin && ptr < end;
  12. }
  13.  
  14. int main()
  15. {
  16. 	vector<int> v;
  17. 	v.resize(15);
  18. 	printf("&v[-1]? %d\n", IsPtrInVector(v, &v[-1]));
  19. 	printf("&v[ 0]? %d\n", IsPtrInVector(v, &v[0]));
  20. 	printf("&v[10]? %d\n", IsPtrInVector(v, &v[10]));
  21. 	printf("&v[14]? %d\n", IsPtrInVector(v, &v[14]));
  22. 	printf("&v[15]? %d\n", IsPtrInVector(v, &v[15]));
  23. 	printf("&v[19]? %d\n", IsPtrInVector(v, &v[19]));
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 3228KB
comments (?)
stdin
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Standard input is empty
stdout
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&v[-1]? 0
&v[ 0]? 1
&v[10]? 1
&v[14]? 1
&v[15]? 0
&v[19]? 0
https://ideone.com/UFPR48
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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