convert a char to std string

Question

I need to use an std  string to store data retrieved by fgets    To do this I need to convert the char  return value from fgets   into an std  string to store in an array  How can this be done

User · Answer

I would like to mention a new method which uses the user defined literal s. This isn't new, but it will be more common because it was added in the C++14 Standard Library.

Largely superfluous in the general case:

string mystring = "your string here"s;

But it allows you to use auto, also with wide strings:

auto mystring = U"your UTF-32 string here"s;

And here is where it really shines:

string suffix;
cin >> suffix;
string mystring = "mystring"s + suffix;

User · Answer

char  data  std  string myString data

User · Answer

std  string has a constructor for this   const char  s    Hello  World    std  string str s     Note that this construct deep copies the character list at s and s should not be nullptr  or else behavior is undefined

User · Answer

char  data  stringstream myStreamString  myStreamString  lt  lt  data  string myString   myStreamString str    cout  lt  lt  myString  lt  lt  endl

User · Answer

Pass it in through the constructor   const char  dat    my string    std  string my string  dat      You can use the function string c str   to go the other way   std  string my string  testing     const char  dat   my string c str

User · Answer

If you already know size of the char   use this instead  char  data        int size        std  string myString data  size     This doesn t use strlen   EDIT  If string variable already exists  use assign     std  string myString  char  data        int size        myString assign data  size

User · Answer

Not sure why no one besides Erik mentioned this  but according to this page  the assignment operator works just fine  No need to use a constructor   assign    or  append     std  string mystring  mystring    This is a test         Assign C string to std string directly std  cout  lt  lt  mystring  lt  lt    n

User · Answer

I ve just been struggling with MSVC2005 to use the std  string char   constructor just like the top-rated answer  As I see this variant listed as  4 on always-trusted http   en cppreference com w cpp string basic string basic string   I figure even an old compiler offers this   It has taken me so long to realize that this constructor absolute refuses to match with  unsigned char   as an argument   I got these incomprehensible error messages about failure to match with std  string argument type  which was definitely not what I was aiming for  Just casting the argument with std  string  char  ucharPtr  solved my problem    duh

User · Answer

Most answers talks about constructing std  string   If already constructed  just use assignment operator   std  string oString  char  pStr          Here allocate and get character string  e g  using fgets as you mentioned   oString   pStr     This is it  It copies contents from pStr to oString

User · Answer

const char  charPointer    Hello  World  n   std  string strFromChar  strFromChar append charPointer   std  cout lt  lt strFromChar lt  lt std  endl

User · Answer

I need to use std  string to store data retrieved by fgets      Why using fgets   when you are programming C    Why not std  getline

[c++] convert a char* to std::string

Examples related to c++

Examples related to stdstring