Copying non null-terminated unsigned char array to std::string

by

std::string has a constructor that takes a pair of iterators and unsigned char can be converted (in an implementation defined manner) to char so this works. There is no need for a reinterpret_cast.

unsigned char u_array[4] = { 'a', 's', 'd', 'f' };

#include <string>
#include <iostream>
#include <ostream>

int main()
{
    std::string str( u_array, u_array + sizeof u_array / sizeof u_array[0] );
    std::cout << str << std::endl;
    return 0;
}

Of course an “array size” template function is more robust than the sizeof calculation.

More Related Contents:

  1. how to change to c code while using for loop and array
  2. Getting a segmentation error when printing my array of strings
  3. The array index doesnt show the character [closed]
  4. Will std::string always be null-terminated in C++11?
  5. What’s the rationale for null terminated strings?
  6. Proper way to copy C strings
  7. Why are strings in C++ usually terminated with ‘\0’?
  8. splitting a string into an array in C++ without using vector
  9. How to convert a char array to a string?
  10. What am I not understanding about getline+strings?
  11. Braces around string literal in char array declaration valid? (e.g. char s[] = {“Hello World”})
  12. Using std::string_view with api that expects null-terminated string
  13. Parse string containing numbers into integer array
  14. Reverse String C++ using char array
  15. How can a char pointer be initialized with a string (Array of characters) but an int pointer not with an array of integer? [duplicate]
  16. Where are string literals stored, and can I modify them?
  17. Transpose a 1D byte-wise array to a 2D array
  18. Sizeof string literal
  19. Why doesn’t C++ support functions returning arrays?
  20. How to compare multiple strings inside an if statement?
  21. Create a directory if it doesn’t exist
  22. Convert Mat to Array/Vector in OpenCV
  23. Array initialization use const variable in C++
  24. Fast String Hashing Algorithm with low collision rates with 32 bit integer [closed]
  25. Convert std::tuple to std::array C++11
  26. std::strings’s capacity(), reserve() & resize() functions
  27. How do I print the full value of a long string in gdb?
  28. How to find the size of an int[]? [duplicate]
  29. C++ 2 dimensional array with variable size rows
  30. What’s the syntax for declaring an array of function pointers without using a separate typedef?

Leave a Comment