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  1. #include <array>
  2. #include <iostream>
  3. #include <string>
  4.  
  5. std::string GetDateFormatString(const std::string& langCode)
  6. {
  7.     if (
  8.        0 == langCode.compare(0, 2, "en")
  9.        || 0 == langCode.compare(0, 2, "EN")
  10.        )
  11.     {
  12.         return std::string("%1$i/%2$i/%3$i");
  13.     }
  14.     else if (
  15.        0 == langCode.compare(0, 2, "fr")
  16.        || 0 == langCode.compare(0, 2, "FR")
  17.        )
  18.     {
  19.         return std::string("%2$i/%1$i/%3$i");
  20.     }
  21.     else if (
  22.        0 == langCode.compare(0, 2, "ja")
  23.        || 0 == langCode.compare(0, 2, "JA")
  24.        || 0 == langCode.compare(0, 2, "jp")
  25.        || 0 == langCode.compare(0, 2, "JP")
  26.        )
  27.     {
  28.         return std::string("%3$i/%2$i/%1$i");
  29.     }
  30.     return std::string("%1$i/%2$i/%3$i");
  31. }
  32.  
  33. #if defined(_WIN32)
  34. #  define sprintfp _sprintf_p
  35. #else
  36. #  define sprintfp snprintf
  37. #endif
  38.  
  39. std::string GetDateString(
  40.     const std::string &langCode,
  41.     int month, int day, int year)
  42. {
  43.     std::string fmt = GetDateFormatString(langCode);
  44.     std::array<char, 32> buffer;
  45.     buffer.fill(0);
  46.     sprintfp(buffer.data(), 32, fmt.c_str(), month, day, year);
  47.     std::string ret = buffer.data();
  48.     return ret;
  49. }
  50.  
  51. int main()
  52. {
  53.     std::cout << GetDateString("en", 11, 7, 2018) << "\n";
  54.     return 0;
  55. }
  56.  
Success #stdin #stdout 0s 15240KB
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Standard input is empty
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11/7/2018
https://ideone.com/sFCDod
Variable Expansion in Strings - Example 6
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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