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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4.  
  5. struct person
  6. {
  7.     std::string firstName;
  8.     std::string middleName;
  9.     std::string lastName;
  10.     std::string streetAddress1;
  11.     std::string streetAddress2;
  12.     std::string city;
  13.     std::string state;
  14.     std::string zip;
  15.     static std::string GetPrintfFormatString()
  16.     {
  17.         static const char FormatString[] = R"(
  18. First Name: %s
  19. Middle Name: %s
  20. Last Name: %s
  21. Street Address 1: %s
  22. Street Address 2: %s
  23. City: %s
  24. State: %s
  25. Zip: %s
  26. )";
  27.         return FormatString;
  28.     }
  29. };
  30.  
  31. void PrintPersonWithPrintf(const person& p)
  32. {
  33.     ::printf(
  34.         p.GetPrintfFormatString().c_str(),
  35.         p.firstName.c_str(), p.middleName.c_str(), p.lastName.c_str(),
  36.         p.streetAddress1.c_str(), p.streetAddress2.c_str(),
  37.         p.city.c_str(), p.state.c_str(), p.zip.c_str());
  38. }
  39.  
  40. void PrintPersonWithSPrintf(const person& p)
  41. {
  42.     std::string formatString = p.GetPrintfFormatString();
  43.     size_t outputLen = formatString.length() + p.firstName.length()
  44.         + p.middleName.length() + p.lastName.length()
  45.         + p.streetAddress1.length() + p.streetAddress2.length()
  46.         + p.city.length() + p.state.length() + p.zip.length()
  47.         + 20;
  48.     std::vector<char> buffer(outputLen, 0);
  49.     ::sprintf(
  50.         buffer.data(), formatString.c_str(),
  51.         p.firstName.c_str(), p.middleName.c_str(), p.lastName.c_str(),
  52.         p.streetAddress1.c_str(), p.streetAddress2.c_str(),
  53.         p.city.c_str(), p.state.c_str(), p.zip.c_str());
  54. 	std::string out = buffer.data();
  55.     std::cout << out;
  56. }
  57.  
  58. int main()
  59. {
  60. 	person me{
  61. 		"Benjamin",
  62. 		"Eugene",
  63. 		"Key",
  64. 		"12343 Some Street",
  65. 		"Apt 826",
  66. 		"Austin",
  67. 		"Texas",
  68. 		"78729"
  69. 	};
  70. 	PrintPersonWithPrintf(me);
  71.     PrintPersonWithSPrintf(me);
  72. 	return 0;
  73. }
  74.  
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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First Name: Benjamin
Middle Name: Eugene
Last Name: Key
Street Address 1: 12343 Some Street
Street Address 2: Apt 826
City: Austin
State: Texas
Zip: 78729

First Name: Benjamin
Middle Name: Eugene
Last Name: Key
Street Address 1: 12343 Some Street
Street Address 2: Apt 826
City: Austin
State: Texas
Zip: 78729
https://ideone.com/5REfdz
Variable Expansion in Strings - Example 4
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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