I have a text file that I need to read a populate a linked list. The file structure is like this.
Ant,Adam 10 5
Mander,Sally 4 3
King,May 6 6
King,Joe 9 6
Graph,Otto 2 5
Carr,Redd 1 3
The name is szName. The second int is iDepartTmUnits, and the last int is iTime;
I'm trying to read the input from stdin It should insert EVT_ARRIVE and EVT_DEPART events into the simulation's eventList. Assuming you are using fgets and sscanf, please make certain you check the count returned from your sscanf.
// Event Constants
#define EVT_ARRIVE 1 // when a person arrives
#define EVT_DEPART 2 // when a person departs the simulation
We have these structures
typedef struct
{
char szName[16]; // Name
int iDepartTmUnits; // time units representing how long he/she stays around
} Person;
// Event typedef (aka Element)
typedef struct
{
int iEventType; // The type of event as an integer:
// EVT_ARRIVE - arrival event
// EVT_DEPART - departure event
int iTime; // The time the event will occur
Person person; // The person invokved in the event.
} Event;
// NodeLL typedef - these are the nodes in the linked list
typedef struct NodeLL
{
Event event;
struct NodeLL *pNext; // points to next node in the list
} NodeLL;
// typedefs for the ordered link list
typedef struct
{
NodeLL *pHead; // Points to the first node in the ordered list
} LinkedListImp;
typedef LinkedListImp *LinkedList;
// typedefs for the Simulation
typedef struct
{
int iClock; // clock time
LinkedList eventList; // A linked list of timed events
} SimulationImp;
typedef SimulationImp *Simulation;
Now where I am struggling is how to populate a linked list with this information. Actually I'm struggling with a lot to grasp my head around this, so I'm sorry at the question being overly complex or overly simple.
First Thing I am struggling with I'm declaring it as
void generateArival(Event eventM[])
I believe that is incorrect, because in my main, I wouldn't pass it the event, I believe I would pass it a Simulation implementation.
Second Thing I Am struggling with Here is the code I have so far where I am too copy from the file into a linked list.
while(!feof(pFilePerson))
{
iLineCount++;
i++;
fgets(szInputBuffer, MAX_LINE_SIZE, pFilePerson);
iScanfCnt = sscanf(szInputBuffer,"%s %d %d\n",
event.person.szName,
event.iTime,
event.person.iDepartTmUnits,
);
}
Lastly
I am to input the EVT_ARRIVE and EVT_DEPART into the eventList.
I believe that to be something like this,
they are int 1 and 2 respectfully, so I would need something like iEvent = event.iEventType;
and input that into the sim->eventList
Any help is appreciated, I need a lot more time with this concept of linked lists, but this is breaking my head.
EDIT
I can print out the name but not the numbers
while(fgets(szInputBuffer, sizeof szInputBuffer, pFilePerson) != NULL)
{
// print the input buffer as is (it also has a linefeed)
//printf("Person # %d: %s\n", iLineCount, szInputBuffer);
sscanf(szInputBuffer,"%s",
event.person.szName);
sscanf(szInputBuffer, "%I64d",
&event.person.iDepartTmUnits);
//linkList.event.iTime);
printf("%-7s\n", event.person.szName);
printf("%d\n", event.person.iDepartTmUnits);
}