Fix cextern helloworld

// Simple C program to display "Hello World"

// Header file for input output functions

#include <stdio.h>

#include <Python.h>

// main function -

// where the execution of program begins

int main()

static PyObject* _helloworld(PyObject* self, PyObject* args)

{

    printf("Hello World\n");

    return Py_None;

}

static PyMethodDef Methods[] = {

    { "helloworld", _helloworld, METH_NOARGS, "Prints Hello World" },

    { NULL, NULL, 0, NULL }

};

    // prints hello world

    printf("Hello World");

// Our Module Definition struct

static struct PyModuleDef Module = {

    PyModuleDef_HEAD_INIT,

    "helloworld",

    "prints Hello World",

    -1,

    Methods

};

    return 0;

// Initializes our module using our above struct

PyMODINIT_FUNC PyInit_helloworld(void)

{

    return PyModule_Create(&Module);

}