fscanf issue

[momotaro]

is it correct to write that:
[CODE=c]

fscanf(InputFil e, "%s %d %d", NewVertex->CarId, NewVertex->x, NewVertex->y);

[/CODE]

[JosAH]

is it correct to write that:
[CODE=c]

fscanf(InputFil e, "%s %d %d", NewVertex->CarId, NewVertex->x, NewVertex->y);

[/CODE]

The *scanf family of functions need an address to store their scanned and converted
values to, so if your expressions result in an char*, int* and an int* everything is fine.

kind regards,

Jos

[momotaro]

hence i dont no where is the problem in those lines of code:
[CODE=c] for(i = 0; i < vehicules; i++)

{

NewVertex = CreatVertex();

// up to here ok

fscanf(InputFil e, "%s %d %d", NewVertex->CarId, NewVertex->x, NewVertex->y);

}

[/CODE]

this is the file:
5

250

Toto 25 50

Foo 20 50

X 50 100

Y -100 -200

Z -5 150

the program cruch

[JosAH]

What is the type of 'NewVertex->x'? If it is an int* you're fine; otherwise you'd
better pass the address of that variable to your *scanf() function. The same
reasoning applies to your NewVertex->y variable.

kind regards,

Jos

[momotaro]

am trying to impliment a linked list to hold a graph (2D linked list col for vertices and rows for edges...)
is this structer correct?

[CODE=c] typedef struct _list list;

struct _list
{
edge *E;
vertex *V;
list *NextVertex,
*NextEdge;
} ;
[/CODE]

[momotaro]

or:

[CODE=c] typedef struct _edge edge;
typedef struct _vertex vertex;
typedef struct _edgelist edgelist;
typedef struct _vertexlist vertexlist;

struct _edge
{
CarID[10];
int distance;
};

struct _vertex
{
CarID[10];
int x,
y;
};

struct edgelist
{
edge *E;
edgelist *next;
};

struct edgevertex
{
vertex *V;
vertexlist *next;
};
[/CODE]

if you have any better implimentation please help!

[momotaro]

originaly am using these structers to impliment my graph:

[CODE=c] typedef struct _edge edge;

typedef struct _vertex vertex;



struct _edge

{

char CarId[10];

int distance;

edge *NextEdge;

};

struct _vertex

{

char CarId[10];

int x,

y;

vertex *NextVertex;

edge *NextEdge;

};

[/CODE]

how should i buil my 2D linked list ?