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  1. #include <iostream>
  2. #include <memory>
  3. #include <cstring>
  4. #include <string>
  5. using namespace std;
  6.  
  7. std::unique_ptr<char[]> ToLower2(const char * const source)
  8. {
  9. 	int length = strlen(source) + 1;
  10. 	char * dest = new char[length + 1];
  11. 	for (int index = 0; index < length; ++index)
  12. 	{
  13. 	    if (source[index] == ' ')
  14.     	    dest[index] = ' ';
  15.     	else
  16.         	dest[index] = tolower(source[index]);
  17. 	}
  18. 	return std::unique_ptr<char[]>(dest);
  19. }
  20.  
  21.  
  22. char * ToLower(const char * const source) // should use const really if you don't intend to change it
  23. {
  24. 	int length = strlen(source) + 1;
  25. 	char * dest = new char[length + 1];
  26.  
  27. 	for (int index = 0; index < length; ++index)
  28. 	{
  29. 	    if (source[index] == ' ')
  30.     	    dest[index] = ' ';
  31.     	else
  32.         	dest[index] = tolower(source[index]);
  33. 	}
  34. 	return dest;
  35.  
  36. }
  37.  
  38.  
  39. int main() {
  40. 	std::string s = "BLA BLA";
  41. 	{
  42. 		char * lower = ToLower(s.c_str()); 
  43. 		cout<<lower<<endl; // use lower
  44. 		//use some more....
  45. 		//finished
  46. 		delete [] lower;
  47. 	}
  48.  
  49. 	{
  50. 		unique_ptr<char[]> lower = ToLower2(s.c_str()); 
  51. 		cout<<lower.get()<<endl; // use lower
  52. 		//use some more....
  53. 		//finished, lower will "delete itself"
  54. 	}
  55. 	return 0;
  56. }
Success #stdin #stdout 0s 3472KB
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https://ideone.com/nrEIeF
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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