Some String questions

[Gluttons]

I need to check my understanding from some questions about strings. It would be great if you can share your opinion about my answers if they are valid or not.
Thanks

How can numeric values stored as Strings be converted to numbers?
a)vector of required numeric data type
b)atoi function in cstdlib library
c)cout statement with required numeric data type

I picked b), I am aware of atoi, atol, and atof as methods to convert, but are there other methods?


What is the purpose of strncat function?

Combines n characters from source string into target string


C++ string provides:
a)convenient way to declare and manage character arrays
b)functions to manipulate strings
c)all of the above
d)none of the above

I picked c)

[Aceix]

Cool...done well

Aceix

[Gluttons]

Thanks very much!