fscanf issue

[momotaro]

is it correct to write that:

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

[JosAH]

is it correct to write that:

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

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:

 for(i = 0; i < vehicules; i++) 
 
{
 
NewVertex = CreatVertex();
 
// up to here ok
 
fscanf(InputFile, "%s %d %d", NewVertex->CarId, NewVertex->x, NewVertex->y);
 
}
 
 

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?

 typedef struct _list list; 
 
struct _list
{
edge *E;
vertex *V;
list *NextVertex,
*NextEdge;
} ;
 

[momotaro]

or:

 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;
}; 
 

if you have any better implimentation please help!

[momotaro]

originaly am using these structers to impliment my graph:

 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;
 
};
 
 

how should i buil my 2D linked list ?