C++ strings and pointers

This is because you have not allocate your objects prior to using them:

string * firstName = new string();
//...
delete firstName;

It’s worth adding that using pointers in this situation is, well, pointless: string objects in the standard C++ library allocate the data for the string from the heap; strings are usually not much more than a pair of pointers anyway.

Related Posts:

  1. C++ – Assigning null to a std::string
  2. Function stoi not declared
  3. Function stoi not declared
  4. What are the differences between a pointer variable and a reference variable in C++?
  5. Easiest way to convert int to string in C++
  6. C++ — expected primary-expression before ‘ ‘
  7. What is `CString`?
  8. Return array in a function
  9. What does “dereferencing” a pointer mean?
  10. Regular cast vs. static_cast vs. dynamic_cast
  11. What is a smart pointer and when should I use one?
  12. What does “dereferencing” a pointer mean?
  13. What is a char*?
  14. How do I include the string header?
  15. What exactly is nullptr?
  16. Differences between C++ string == and compare()?
  17. How to convert a char array to a string?
  18. How do I convert a double into a string in C++?
  19. Split a string using C++11
  20. How do I iterate over the words of a string?
  21. How do I iterate over the words of a string?
  22. Returning an empty string : efficient way in c++
  23. C++ string to double conversion
  24. What is use of c_str function In c++
  25. What is uintptr_t data type
  26. What is the difference between const int*, const int * const, and int const *?
  27. C++ – No matching member function for call to ‘push_back’
  28. C++ Parsing input string to variables
  29. What does int & mean
  30. What is the difference between const int*, const int * const, and int const *?
  31. How do I tokenize a string in C++?
  32. Why use string::iterator rather than index?
  33. C++ deprecated conversion from string constant to ‘char*’
  34. Passing a 2D array to a C++ function
  35. identifier “string” undefined?
  36. Converting a vector to string
  37. How can I convert const char* to string and then back to char*?
  38. std::string formatting like sprintf
  39. Sorting Characters Of A C++ String
  40. basic_string::_M_construct null not valid after constructing subvector of strings
  41. Can’t resolve Error: indirection requires pointer operand (‘int’ invalid)
  42. How to return a string from a C++ function?
  43. What is the difference between isdigit() and isnumber()?
  44. Convert char* to string C++
  45. How to access the contents of a vector from a pointer to the vector in C++?
  46. printf with std::string?
  47. Read whole ASCII file into C++ std::string
  48. How to make an array with a dynamic size? General usage of dynamic arrays (maybe pointers too)?
  49. C++ String Variable Declaration
  50. What does int & mean
  51. Split a string into an array in C++
  52. C++: Expression must have a constant value when declaring array inside function
  53. splitting a string into an array in C++ without using vector
  54. Remove spaces from std::string in C++
  55. Delete 2D array C++
  56. Remove spaces from std::string in C++
  57. c++ convert string to hex
  58. How can I iterate through a string and also know the index (current position)?
  59. c++ parse int from string [duplicate]
  60. C++ Expression must have pointer-to-object type
  61. initial value of reference to non-const must be an lvalue
  62. Typedef function pointer?
  63. How to initialize a vector of pointers
  64. How to Convert a C++ String to Uppercase
  65. std::cin input with spaces?
  66. C++ Remove punctuation from String
  67. How to alphabetically sort strings?
  68. Hash function for a string
  69. How do I check if a C++ std::string starts with a certain string, and convert a substring to an int?
  70. Using C-string gives Warning: “Address of stack memory associated with local variable returned”
  71. Reference to non-static member function must be called
  72. Why use pointers?
  73. Why I cannot cout a string?
  74. How to print a string in C++
  75. std::string length() and size() member functions
  76. How to convert QString to int?
  77. What’s the difference between * and & in C?
  78. Which is faster C++ String length() or size()?
  79. How do I create a random alpha-numeric string in C++?
  80. error: switch quantity not an integer
  81. Reading a string from file c++
  82. How to change string into QString?
  83. Remove last character from C++ string
  84. Converting String to Cstring in C++
  85. c++ sizeof( string )
  86. C++ Array of pointers: delete or delete []?
  87. Warning: comparison of distinct pointer types
  88. ‘setprecision’ is not a member of ‘std’
  89. Initializing pointers in C++
  90. Difference between function arguments declared with & and * in C++
  91. Is C++ Array passed by reference or by pointer?
  92. enum to string in modern C++11 / C++14 / C++17 and future C++20
  93. set head to NULL (‘NULL’ : undeclared identifier)
  94. What is a `char*`?
  95. Converting bool to text in C++
  96. clearing a vector of pointers [duplicate]
  97. Array of Linked Lists C++
  98. Declaration is incompatible with type
  99. I’m getting the error “stoi is not a member of std” in myprogramminglab [duplicate]
  100. Differences between unique_ptr and shared_ptr

Leave a Comment

techhipbettruvabetnorabahisbahis forumueduseduseduedueduseduseduseduseduedu