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  1. #include <iostream>
  2. #include <string>
  3. #include <array>
  4. #include <algorithm>
  5. #include <cstring>
  6.  
  7. const uint STRING_LENGTH = 25;
  8.  
  9. class fixedString
  10. {
  11. 	std::array<char, STRING_LENGTH+1> cdata;
  12.  
  13. public:
  14. 	fixedString(const std::string &s)
  15. 		: fixedString(s.c_str(), s.size())
  16. 	{
  17. 	}
  18.  
  19. 	fixedString(const char *s)
  20. 		: fixedString(s, std::strlen(s))
  21. 	{
  22. 	}
  23.  
  24. 	fixedString(const char *s, const size_t len)
  25. 	{
  26. 		std::copy_n(s, std::min<size_t>(len, STRING_LENGTH), cdata.begin());
  27. 		if (len < STRING_LENGTH)
  28. 			std::fill_n(cdata.begin()+len, STRING_LENGTH-len, ' ');
  29. 		cdata[STRING_LENGTH] = '\0';
  30. 	}
  31.  
  32. 	friend std::ostream& operator<<(std::ostream& os, const fixedString &s)
  33. 	{
  34. 		os << s.cdata.data();
  35. 		return os;	
  36. 	}
  37. };
  38.  
  39. struct parameter {
  40.     double value;
  41.     fixedString name;
  42.  
  43.     parameter(double _value, const fixedString &_name)
  44.         : value(_value), name(_name)
  45.     {
  46.     }
  47. };
  48.  
  49. int main() {
  50.     parameter A(0.5, "my_variable");
  51.     parameter B(-0.1, "my other variable with the name that is too long and has to be truncated!");
  52.  
  53.     std::cout << "parameter name: " << A.name << "\tis:\t" << A.value << '\n';
  54.     std::cout << "parameter name: " << B.name << "\tis:\t" << B.value << '\n';
  55. }
Success #stdin #stdout 0.01s 5492KB
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Standard input is empty
stdout
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parameter name: my_variable              	is:	0.5
parameter name: my other variable with th	is:	-0.1
https://ideone.com/eWiCrW
language:
C++ 4.3.2 (gcc-4.3.2)
created:
4 years ago
visibility:
public

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