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  1. #include <iostream>
  2. #include <string>
  3. #include <cstring>
  4.  
  5. using namespace std;
  6.  
  7. bool  mytext (char *buffer, int* buffer_size)
  8. {
  9.     const std::string s = "cyberforum 2020 г.";
  10.  
  11.     if((*buffer_size)<s.size()+1)
  12.     {
  13.        *buffer_size = s.size(); 
  14.        return false;
  15.     }
  16.  
  17.     strcpy(buffer,s.c_str());
  18.    *buffer_size = s.size(); 
  19.    return true;
  20. }
  21.  
  22. int main()
  23. {
  24. 	int size = 512;
  25. 	string buffer(size,'?');
  26.  
  27. 	bool rc =mytext(&buffer[0],&size);
  28.  
  29. 	if(rc)
  30. 	{
  31. 	   buffer.resize(size);	  
  32. 	   cout << "result:"<< buffer <<endl;
  33. 	}   
  34. 	else
  35. 	   cout << "need bytes:"<< size <<endl;
  36.  
  37. 	return 0;
  38. }
Success #stdin #stdout 0s 4392KB
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result:cyberforum 2020 г.
https://ideone.com/7nilWG
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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