NUL char in strings in C++ -

in below code trying replace first character '\0'.

i expected print empty string, in output omits , displays rest of characters.

int main() {     string str;     cin >> str;      str[0] = '\0';      cout << str << "\n";     return 0; }

output :

   testing    esting

how terminate string in c++?

ps: trying approach of terminating string in different question in need terminate in between.

std::string not null terminated string. if want empty use clear() method. if want remove element of string use erase() method.

My