Pointers

Pointers to Character Strings

The string class has a constructor string(char *) that you can use to convert any character pointer or array to a safe an convenient string object.
```
char* p = "Harry";
string name(p);
```
Use the c_str member function of the string class to obtain a char* pointer that points to the first character in the string object.
The tempnam function in the standard library yields the name of a temporary file, and expects a char* parameter for the directory name.
```
string dir = . . .;
char* p = tempnam(dir.c_str(), NULL);
string file_name(p);
```