Hi,

1. What is the difference between
        c_str () and data () methods in std::string?

2. Are there any situations when we must use data () but not c_str ()?

        Thanks in avance,
        Alex


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Alex Vinokur wrote:

> 1. What is the difference between
>         c_str () and data () methods in std::string?

c_str returns a pointer to a null terminated array of charT (of size
size() + 1); data returns a pointer to an array of size size(),
w/o the '\0' at the end

> 2. Are there any situations when we must use data () but not c_str ()?

I don't know of any.

--

Valentin Bonnard
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Alex Vinokur wrote:
>
> Hi,
>
> 1. What is the difference between
>         c_str () and data () methods in std::string?
>
> 2. Are there any situations when we must use data () but not c_str ()?

Implementors may choose to implement c_str() in ways that require them
to allocate an extra byte of memory the first time c_str() is called, to
store the terminating '\0'. data() avoids that possibility; a minor
issue, in most cases.


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