#include <stdio.h>

int myfunc(int *myvar);


int main()
{
	int myint = 5;
	int b = 0;
	int error =0;
	int *mypointer = &myint;
	int myarray[] = {1,3,5,7,9};
	
	
	  printf("myint = %d\n", myint);			/* prints the integer value of the variable*/
	printf("&myint = %d\n", &myint);			/* prints the address of the variable
	/*printf("*myint = %d\n",*myint);*/			/*This line doesn't compile - why not?*/


	printf("mypointer = %d\n", mypointer);			/*print the value stored in mypointer*/
	printf("*mypointer = %d\n", *mypointer);		/*dereference the pointer - printer the value at the address pointed to*/
	printf("&mypointer = %d\n\n", &mypointer);		/*print the address of the pointer, ie the actual address in memory when the pointer is stored*/
	
	*mypointer = 456;					/* deference my pointer - set the contents of the address pointed to to 456*/
	printf("myint now = %d\n", myint);			/* now print the contents of myint and notice the change*/
	
	
	
	error = myfunc(&myint);					/*call myfunc, and pass my int by reference*/
	printf("after myfunc, myint now = %d\n", myint);	/*print the new value of myint*/
	

	return 0;
}

int myfunc(int *myvar)						/*dereference myvar in the function*/
{
	*myvar = *myvar + 6;					/*add 6 to the contents of the memory address stored in *myvar, then save this in the memory address 
								at *myvar*/
	
	return 1;
}