char* vs const char* as a parameter

Question

There are many times that I get compile errors when I use char* instead of const char*. So, I am not sure the actual difference, the syntax and the com

Answer 1

I always try to define parameters with const char* not char* because converting from std::string to conts char* is easy by .c_str() method. However converting std::string to char* is not that easy.