How to copy a string of std string type in C

Question

I used the strcpy   function and it only works if I use C-string arrays like  char a 6     quot text quot   char b 6     quot image quot   strcpy a b    but whenever I use string a    quot text quot   string b    quot image quot   strcpy a b    I get this error   functions cpp  no matching function for call to strcpy std  string amp   std  string amp    How to copy 2 strings of string data type in C

User · Accepted Answer

You shouldn t use strcpy   to copy a std  string  only use it for C-Style strings  If you want to copy a to b then just use the   operator  string a    quot text quot   string b    quot image quot   b   a

User · Answer

strcpy is only for C strings  For std  string you copy it like any C   object   std  string a    text   std  string b   a     copy a into b   If you want to concatenate strings you can use the   operator   std  string a    text   std  string b    image   a   a   b     or a    b    You can even do many at once   std  string c   a         b    hello     Although  hello      world  doesn t work as you might expect  You need an explicit std  string to be in there  std  string  Hello      world

User · Answer

Caesar s solution is the best in my opinion  but if you still insist to use the strcpy function  then after you have your strings ready  string a    quot text quot   string b    quot image quot    You can try either  strcpy a data    b data      or strcpy a c str    b c str      Just call either the data   or c str   member functions of the std  string class  to get the char  pointer of the string object  The strcpy   function doesn t have overload to accept two std  string objects as parameters  It has only one overload to accept two char  pointers as parameters  Both data and c str return what does strcpy   want exactly

User · Answer

strcpy example    include  lt stdio h gt   include  lt string h gt   int main        char str1    Sample string      char str2 40      strcpy  str2 str1      printf   str1   s n  str1      return 0       Output  str1  Sample string  Your case   A simple   operator should do the job   string str1  Sample string    string str2   str1

[c++] How to copy a string of std::string type in C++?

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