Do I have to use #include beside ?

by

Yes, you have to include what you use. It’s not mandated that standard headers include one another (with a few exceptions IIRC). It might work now, but might fail on a different compiler.

In your case, apparently <iostream> includes <string>, directly or indirectly, but don’t rely on it.

More Related Contents:

  1. Converting std::__cxx11::string to std::string
  2. Why does omission of “#include ” only sometimes cause compilation failures?
  3. No matching function – ifstream open()
  4. Difference between string and char[] types in C++
  5. How do I check if a C++ string is an int?
  6. Custom manipulator for C++ iostream
  7. What is the type of a string literal in C++? [duplicate]
  8. Pointer to string with spaces [closed]
  9. How do I print a double value with full precision using cout?
  10. std::cin input with spaces?
  11. Case-insensitive string comparison in C++ [closed]
  12. What is uintptr_t data type
  13. C++ performance challenge: integer to std::string conversion
  14. How to output a character as an integer through cout?
  15. std::string to char*
  16. How do I create a random alpha-numeric string in C++?
  17. How to convert string to char array in C++?
  18. What makes more sense – char* string or char *string? [duplicate]
  19. C/C++: Optimization of pointers to string constants
  20. Why does C++ allow an integer to be assigned to a string?
  21. Proper way to copy C strings
  22. Why are strings in C++ usually terminated with ‘\0’?
  23. Conversion from string literal to char* is deprecated
  24. String to enum in C++
  25. writing directly to std::string internal buffers
  26. Alternative function in iostream.h for getch() of conio.h?
  27. is it ok to specialize std::numeric_limits for user-defined number-like classes?
  28. Press Enter to Continue
  29. how to get hash code of a string in c++
  30. How to find and replace all occurrences of a substring in a string?

Leave a Comment