How to convert "string" type to "char * " in c++

jonwatson · 06-05-2008, 02:41 PM

Quote:

Originally Posted by Nylex

c_str() returns a constant C-string. I suppose you could use strcpy() or strncpy() (cstring header) to do what you want.

Hmmm...OK, I'll try something else. I would have thought that it wouldn't matter if it returns a const until I try to change it, which I am not.

Jon

Nylex · 06-05-2008, 02:45 PM

c_str() returns a const pointer, so even though you aren't trying to modify it, storing it in a non-const variable leaves open the possibility of modification. At least that's what I think is happening.

jonwatson · 06-05-2008, 02:53 PM

Yup, that was it. I did try to change p to const char* but it still threw an error. What I didn't notice is that is was the same error, but on a different line after the change. The second error was in reference to me passing the const char* to a function that I wrote that only have char* as an input argument. So, it appeared that I was getting the same error regardless. However, changing the function argument to const char* fixed it all up.

Thanks

swodniw · 06-05-2008, 03:10 PM

I am sure this is a typo but

Quote:

c_str() returns a const pointer,

c_str returns a pointer to constant char, not a constant pointer to char.