#include <stdio.h> // include funciton headers from stdo library
#include <time.h> //  this gets us time() and localtime() function and types.

/////////////////////////////////////////////////////////
// prototypes

void get_year( int * );      // takes int pointer, and stores current year there.
void prompt_input ( int * ); // takes int pointer, and stores input there.

/////////////////////////////////////////////////////////

int main (void)
{
   
   int * birth_year, * this_year;
   
   prompt_input (birth_year); // takes pointer, returns nothing
   printf("You entered: %d\n", *birth_year);

   get_year(this_year);
   printf("Date is %d\n", *this_year );
   
   
   return 0;  
} 
/////////////////////////////////////////////////////////
void prompt_input ( int * input )
{ 
  printf("Input your year of birth and press Enter.(i.e.1969): "); // prompt for input
  scanf( "%d", input ); // read from stdin, store in address pointed to by input pointer.
  return;
}
/////////////////////////////////////////////////////////
void get_year(int * year)
{
  time_t tim=time(NULL);     // declare variable 
  struct tm *now=localtime(&tim);
  *year= (now->tm_year + 1900);
  return;
}