10050

Does the system() function belong to C or C++?

#include <stdio.h> #include <stdlib.h> void main () { system("dir"); }

I have read in many C++ books where system() is used to execute command line programs. But when I tried the same command in C, it worked perfectly. So my question is whether its a standard C or C++ function? Please be liberal as I am new to C programming.

Answer1:

As system function is declared in stdlib.h, it can be considered a C function. But in C++, stdlib.h is merged into the std namespace and is located in the cstdlib include in this form. So the correct answer is "both".

Answer2:

It is both C and C++.

    <li>system : http://en.cppreference.com/w/c/program/system</li> <li>std::system: http://en.cppreference.com/w/cpp/utility/program/system</li> </ul>

    Answer3:

    Both: it's defined by the standard C library, and the standard C++ library contains the C library.

    In C++, you should include the C++ style header, <cstdlib>, and refer to it as std::system. Including C headers directly is deprecated.

    Answer4:

    It's both. C defines many functions. C++ defines many functions that are exactly the same as in C, some that are subtly different from how they are in C, and a lot of functions and classes that aren't part of C at all. Knowing that a function is part of standard C++ says nothing about whether it is part of standard C, and knowing that a function is part of standard C says little about whether it is part of standard C++.

    Answer5:

    Both c and cpp support the function system as they have support for the stdlib.h that contains the prototype of system() function.

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