https://stackoverflow.com › questions › 347949

If you just want to pass a std::string to a function that needs const char *, you can use .c_str(): std::string str; const char * c = str.c_str(); And if you need a non-const char *, call .data(): std::string str; char * c = str.data(); .data() was added in C++17. Before that, you can use &str[0].

https://stackoverflow.com › questions › 7352099

To obtain a const char * from an std::string use the c_str() member function : std::string str = "string"; const char* chr = str.c_str(); To obtain a non-const char * from an std::string you can use the data() member function which returns a non-const pointer since C++17 : std::string str = "string"; char* chr = str.data();

https://www.techiedelight.com › convert-std-string-const-char-cpp

Learn how to convert a std::string to const char* in C++ using three different methods: string::c_str, string::data, and &str[0]. See the code examples, output, and explanations for each method.

https://www.techiedelight.com › fr › convert-std-string-const-char-cpp

Cet article explique comment convertir un std::string en const char* en C++. Le pointeur renvoyé doit pointer vers un tableau de caractères contenant la même séquence de caractères que celle présente dans l'objet chaîne et un terminateur nul supplémentaire à la fin.

https://www.techiedelight.com › fr › convert-std-string-char-cpp

Cet article explique comment convertir un `std::string` en `char*` en C++. Le tableau renvoyé doit contenir la même séquence de caractères que celle présente dans l'objet chaîne, suivi d'un caractère nul de fin à la fin.

https://riptutorial.com › cplusplus › example › 2165 › conversion-to--const--char-

In order to get const char* access to the data of a std::string you can use the string's c_str() member function. Keep in mind that the pointer is only valid as long as the std::string object is within scope and remains unchanged, that means that only const methods may be called on the object.

https://www.geeksforgeeks.org › how-to-convert-std-string-to-char-in-cpp

To convert a std::string to a char*, we can use the std::string:c_str() method that returns a pointer to a null-terminated character array (a C-style string). C++ Program to Convert std::string to char*

https://www.tutorialspoint.com › How-to-convert-an-std-string-to-const-char-or-char-in...

How to convert an std string to const char or char in C - You can use the c_str () method of the string class to get a const char* with the string contents. example#include using namespace std; int main () { string x (hello); const char* ccx = x.c_str (); cout.

https://www.geeksforgeeks.org › why-is-conversion-from-string-constant-to-char-valid-in...

In C, it’s permissible to assign a string constant to a ‘char*’ variable and the reason behind it is historical. When C was developed, the ‘const’ keyword didn’t exist, so string constants were just ‘char []’. Therefore, for backward compatibility, C allows assigning a string constant to a ‘char*’. For example, the following code is valid in C: