Convert string to const char* issue

Question

string str1 = "hello";
    const char* string1 = str1;

I get an error..

cannot convert ‘std::string {aka std::basic_string}’ to ‘const char*’ in initialization

how do i cast string to const char*

Thanks for helping

billz · Accepted Answer · 2013-07-25T09:41:26.600

13

how do i cast string to const char*?

use std::string::c_str() function, it returns a non-modifiable standard C character array version of the string.

const char* string1 = str1.c_str();

edited Jul 25 '13 at 09:41

answered Jul 25 '13 at 09:24

billz

Which is valid until the next call to a non-const member of `string` (or the destructor of the string object). – James Kanze Jul 25 '13 at 09:34
str1.data() is not guaranteed to be null terminated so I would be a bit careful of this. – doron Jul 25 '13 at 09:40
that's right. thanks! – billz Jul 25 '13 at 09:41

score 2 · Answer 2 · answered Jul 25 '13 at 09:24

2

Try const char* string1 = str1.c_str();

answered Jul 25 '13 at 09:24

Constantinius

score -1 · Answer 3 · edited Jul 25 '13 at 10:17

-1

How about this solution:

string str1 = "hello";
const char* string1 = str1.c_str();

edited Jul 25 '13 at 10:17

answered Jul 25 '13 at 09:30

Subhajit

3 Answers3