error C2679: binary ‘<<' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion)

You forgot to #include <string>

using std::string without including it’s header works on some compilers that indirectly import parts of <string> into their <iostream> or other headers but that’s not standard and shouldn’t be relied upon. Also they often break when you try to output a string since they only included a part of the implementation and are missing the part that implements the operator<<.

Related Posts:

  1. C++: std does not have member “string”
  2. What is a lambda expression in C++11?
  3. ld: symbol(s) not found for architecture x86_64 error
  4. What is the ‘override’ keyword in C++ used for? [duplicate]
  5. What is a smart pointer and when should I use one?
  6. Meaning of = delete after function declaration
  7. C++ std::priority_queue uses the lambda expression
  8. Usage and Syntax of std::function
  9. What exactly is nullptr?
  10. Difference between `constexpr` and `const`
  11. How to use _CRT_SECURE_NO_WARNINGS
  12. Split a string using C++11
  13. How to create timer events using C++ 11?
  14. What does T&& (double ampersand) mean in C++11?
  15. Segmentation fault error 11 C++
  16. Why doesn’t C++ have a garbage collector?
  17. Compiling C++11 with g++
  18. terminate called after throwing an instance of ‘std::invalid_argument’ what(): stoi
  19. What exactly is std::atomic?
  20. SDL2.DLL missing
  21. Issue with std::stol – ‘std::invalid_argument’ what(): stol
  22. terminate called after throwing an instance of ‘std::out_of_range’
  23. Cleanest way to copy a constant size array in c++11
  24. push_back vs emplace_back
  25. undefined reference to ‘std::cout’
  26. What is move semantics?
  27. expression preceding parentheses of apparent call must have (pointer-to-) function type
  28. C++ error: Undefined symbols for architecture x86_64
  29. C++ terminate called without an active exception
  30. The #include exists, but I get an error: identifier “cout” is undefined. Why?
  31. Thread pooling in C++11
  32. How does std::forward work? [duplicate]
  33. Identifier is undefined
  34. Difference in make_shared and normal shared_ptr in C++
  35. What is std::move(), and when should it be used?
  36. push_back vs emplace_back
  37. error: use of deleted function
  38. Call to implicitly deleted copy constructor in LLVM
  39. cc1plus: error: unrecognized command line option “-std=c++11” with g++
  40. no match for ‘operator<<’ in ‘std::operator
  41. Warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11?
  42. Use the auto keyword in C++ STL
  43. Call to non-static member function without an object argument compiler error
  44. Does C++11 have C#-style properties?
  45. Iterator Loop vs index loop
  46. initialize a vector to zeros C++/C++11
  47. When is it safe to call this-> in constructor and destructor
  48. How to memset char array with null terminating character?
  49. How well is Unicode supported in C++11?
  50. The CXX compiler identification is unknown
  51. How to automatically convert strongly typed enum into int?
  52. Why should I use a pointer rather than the object itself?
  53. too many initializers for ‘int [0]’ c++
  54. overloaded function with no contextual type information
  55. Creating folders in C++
  56. MSVCP120d.dll missing
  57. convert string to size_t
  58. Compiling C++11 with g++
  59. ERROR C2039: ‘vector’: is not a member of ‘std’
  60. Where can I find ‘winmm.lib’ (I’m using Visual Studio 2012)
  61. Does static constexpr variable inside a function make sense?
  62. c++ vector bubble sort
  63. How to use bitmask?
  64. Differences between unique_ptr and shared_ptr
  65. C++ convert from 1 char to string?
  66. Pause Console in C++ program
  67. What is the array form of ‘delete’?
  68. Error: Expression must have integral or unscoped enum type
  69. Use new operator to initialise an array
  70. Remove secure warnings (_CRT_SECURE_NO_WARNINGS) from projects by default in Visual Studio
  71. Undefined Symbols for architecture x86_64: Compiling problems
  72. “No viable overloaded ‘=’ ” why?
  73. Check if a string contains a string in C++
  74. invalid new-expression of abstract class type
  75. std::string to char*
  76. Does the ‘mutable’ keyword have any purpose other than allowing the variable to be modified by a const function?
  77. Random number c++ in some range
  78. “g++” is not recognized as an internal or external command, MinGW
  79. Compiling a C++ program with gcc
  80. Sorting Linked List C++ with pointers
  81. Get Unix timestamp with C++
  82. Class prototyping
  83. How to dynamically allocate an array of pointers in C++?
  84. How do I compile C++ to JavaScript in a browser?
  85. Is the sizeof(some pointer) always equal to four?
  86. How does rhs work?
  87. error: expected unqualified-id before ‘.’ token //(struct)
  88. Base class undefined
  89. C++ – Assigning null to a std::string
  90. The program can’t start because libgcc_s_dw2-1.dll is missing
  91. CMake : C and CXX compiler identification is unknown Win10 CMakeGUI
  92. Error “Unterminated conditional directive” in cross-referencing headers
  93. C++ template – error: expected initializer before ‘<' token
  94. Call of overloaded function is ambiguous
  95. ‘cout’ does not name a type
  96. C++ Cannot call constructor directly in small example
  97. C++ compiler error c4430 “c++ doesnt support default int”
  98. Using OpenMP with clang
  99. istream and ostream problem – C++
  100. List iterator not dereferencable?

Leave a Comment