Doubts in header file

#1
  1. what is string, string.h, cstring ??
  2. what is the difference between all these header file ??
  3. strlen() returns the length of string including null character or without null character ??
#2

In C++ you should include cstring as the header while in c you should include string.h as the header.

In C++

#include <cstring>

In C

#include <string.h>

strlen() returns the number of data characters starting at the address passed to it. This does not include the null “character” which indicates string termination.

#3

what is the difference string, cstring ??

#4

string is a data type in c++
cstring is header file

#5

string is also a header file
i am asking for the difference between string header file and cstring header file

#6
  • <string.h> contains old functions like strcpy , strlen for C style null-terminated strings.
  • <string> primarily contains the std::string , std::wstring and other classes.

It should also be noted that using string.h is deprecated within C++. If you need the functionality contained within, you should use the header cstring .

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#7

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