Sep 14, 2011 · c_str() converts a C++ string into a C-style string which is essentially a null terminated array of bytes. You use it when you want to pass a C++ string into a function that …

Jul 1, 2013 · In C++11 standard it's explicitly stated that .c_str() (as well as newer .data()) shall return pointer to the internal buffer which is used by std::string. Any modification of the …

Jun 2, 2014 · c_str() in my opinion is only really useful when the elements of your string are character based. Extra: In C++11 onwards, both functions are required to be the same. i.e. …

Feb 5, 2023 · In the new specification of C++ (C++11) it is now required that c_str returns a direct pointer to the controlled sequence. In other words, in general case the result of c_str will point …

Sep 25, 2021 · Prior to C++11, the behavior of c_str() was technically implementation-specific, but most implementations I've ever seen worked this way, as it is the simplest and sanest way to …

I don't have enough credits to comment below the answers. The question was elaborated well and detailed in another OS question atoi implementation in C++ by @sim642: The part str[i] - '0' …

2) Replaces the contents of the underlying string as if by calling rdbuf()->str(new_str)... Notes The copy of the underlying string returned by str is a temporary object that will be destructed at the …

Dec 7, 2008 · Use the .c_str() method for const char *.. You can use &mystring[0] to get a char * pointer, but there are a couple of gotcha's: you won't necessarily get a zero terminated string, …

Jan 20, 2017 · std::string str = "string"; std::vector<char> str_copy(str.c_str(), str.c_str() + str.size() + 1); char* chr = str_copy.data(); But beware that this won't let you modify the string contained …

Feb 24, 2012 · str[i] returns character at index i. If it is a character array: char str[6] = "hello"; for (int i = 0; str[i] != '\0'; i++){ cout << str[i]; } Basically above two are two type of strings supported …