Explain This: BST_TREE* BST_Create(int (*compare)(void* argu1, void* argu2));
0
I can't understand the argument, i've seen it for the 1st time.
below is the structure:
typedef struct node{
void* dataPtr;
struct node* left;
struct node* right;
}NODE;
typedef struct{
int count;
int (*compare)(void* argu1, void* argu2);
NODE* root;
}BST_TREE;
This is Prototype:
BST_TREE* BST_Create(int (*compare)(void* argu1, void* argu2));
This is Function:
BST_TREE* BST_Create(int (*compare)(void* argu1, void *argu2)){
BST_TREE* tree;
tree = (BST_TREE*)malloc(sizeof(BST_TREE));
if(tree){
tree->root = NULL;
tree->count = 0;
tree->compare = compare;
}
return tree;
}
c
asked Nov 21 '18 at 17:22
Rahul Bhaskar
65
add a comment |
0
I can't understand the argument, i've seen it for the 1st time.
below is the structure:
typedef struct node{
void* dataPtr;
struct node* left;
struct node* right;
}NODE;
typedef struct{
int count;
int (*compare)(void* argu1, void* argu2);
NODE* root;
}BST_TREE;
This is Prototype:
BST_TREE* BST_Create(int (*compare)(void* argu1, void* argu2));
This is Function:
BST_TREE* BST_Create(int (*compare)(void* argu1, void *argu2)){
BST_TREE* tree;
tree = (BST_TREE*)malloc(sizeof(BST_TREE));
if(tree){
tree->root = NULL;
tree->count = 0;
tree->compare = compare;
}
return tree;
}
c
asked Nov 21 '18 at 17:22
Rahul Bhaskar
65
Do you realize that it is a pointer to a function? If not, that's what it is. You can now search for the ins and outs of pointers to functions. If you know it's a pointer to a function, what's the problem? It is presumably used to ensure that elements in the BST are in the correct order — it compares two nodes given pointers to the nodes, identifying which comes first and which comes second, or that they're equal.
– Jonathan Leffler
Nov 21 '18 at 17:25
Get a good book or find a good tutorial, one that explains function pointers.
– Some programmer dude
Nov 21 '18 at 17:25
By the way, considering that you should not castmallocin C, the code you found might not be the best to learn from.
– Some programmer dude
Nov 21 '18 at 17:26
add a comment |
0
0
0
I can't understand the argument, i've seen it for the 1st time.
below is the structure:
typedef struct node{
void* dataPtr;
struct node* left;
struct node* right;
}NODE;
typedef struct{
int count;
int (*compare)(void* argu1, void* argu2);
NODE* root;
}BST_TREE;
This is Prototype:
BST_TREE* BST_Create(int (*compare)(void* argu1, void* argu2));
This is Function:
BST_TREE* BST_Create(int (*compare)(void* argu1, void *argu2)){
BST_TREE* tree;
tree = (BST_TREE*)malloc(sizeof(BST_TREE));
if(tree){
tree->root = NULL;
tree->count = 0;
tree->compare = compare;
}
return tree;
}
c
asked Nov 21 '18 at 17:22
Rahul Bhaskar
65
I can't understand the argument, i've seen it for the 1st time.
below is the structure:
typedef struct node{
void* dataPtr;
struct node* left;
struct node* right;
}NODE;
typedef struct{
int count;
int (*compare)(void* argu1, void* argu2);
NODE* root;
}BST_TREE;
This is Prototype:
BST_TREE* BST_Create(int (*compare)(void* argu1, void* argu2));
This is Function:
BST_TREE* BST_Create(int (*compare)(void* argu1, void *argu2)){
BST_TREE* tree;
tree = (BST_TREE*)malloc(sizeof(BST_TREE));
if(tree){
tree->root = NULL;
tree->count = 0;
tree->compare = compare;
}
return tree;
}
c
c
asked Nov 21 '18 at 17:22
Rahul Bhaskar
65
asked Nov 21 '18 at 17:22
Rahul Bhaskar
65
asked Nov 21 '18 at 17:22
Rahul Bhaskar
65
asked Nov 21 '18 at 17:22
Rahul Bhaskar
65
asked Nov 21 '18 at 17:22
Rahul Bhaskar
65
65
Do you realize that it is a pointer to a function? If not, that's what it is. You can now search for the ins and outs of pointers to functions. If you know it's a pointer to a function, what's the problem? It is presumably used to ensure that elements in the BST are in the correct order — it compares two nodes given pointers to the nodes, identifying which comes first and which comes second, or that they're equal.
– Jonathan Leffler
Nov 21 '18 at 17:25
Get a good book or find a good tutorial, one that explains function pointers.
– Some programmer dude
Nov 21 '18 at 17:25
By the way, considering that you should not castmallocin C, the code you found might not be the best to learn from.
– Some programmer dude
Nov 21 '18 at 17:26
add a comment |
Do you realize that it is a pointer to a function? If not, that's what it is. You can now search for the ins and outs of pointers to functions. If you know it's a pointer to a function, what's the problem? It is presumably used to ensure that elements in the BST are in the correct order — it compares two nodes given pointers to the nodes, identifying which comes first and which comes second, or that they're equal.
– Jonathan Leffler
Nov 21 '18 at 17:25
Get a good book or find a good tutorial, one that explains function pointers.
– Some programmer dude
Nov 21 '18 at 17:25
By the way, considering that you should not castmallocin C, the code you found might not be the best to learn from.
– Some programmer dude
Nov 21 '18 at 17:26
Do you realize that it is a pointer to a function? If not, that's what it is. You can now search for the ins and outs of pointers to functions. If you know it's a pointer to a function, what's the problem? It is presumably used to ensure that elements in the BST are in the correct order — it compares two nodes given pointers to the nodes, identifying which comes first and which comes second, or that they're equal.
– Jonathan Leffler
Nov 21 '18 at 17:25
Do you realize that it is a pointer to a function? If not, that's what it is. You can now search for the ins and outs of pointers to functions. If you know it's a pointer to a function, what's the problem? It is presumably used to ensure that elements in the BST are in the correct order — it compares two nodes given pointers to the nodes, identifying which comes first and which comes second, or that they're equal.
– Jonathan Leffler
Nov 21 '18 at 17:25
Get a good book or find a good tutorial, one that explains function pointers.
– Some programmer dude
Nov 21 '18 at 17:25
Get a good book or find a good tutorial, one that explains function pointers.
– Some programmer dude
Nov 21 '18 at 17:25
By the way, considering that you should not cast
malloc in C, the code you found might not be the best to learn from.– Some programmer dude
Nov 21 '18 at 17:26
By the way, considering that you should not cast
malloc in C, the code you found might not be the best to learn from.– Some programmer dude
Nov 21 '18 at 17:26
add a comment |
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Do you realize that it is a pointer to a function? If not, that's what it is. You can now search for the ins and outs of pointers to functions. If you know it's a pointer to a function, what's the problem? It is presumably used to ensure that elements in the BST are in the correct order — it compares two nodes given pointers to the nodes, identifying which comes first and which comes second, or that they're equal.
– Jonathan Leffler
Nov 21 '18 at 17:25
Get a good book or find a good tutorial, one that explains function pointers.
– Some programmer dude
Nov 21 '18 at 17:25
By the way, considering that you should not cast
mallocin C, the code you found might not be the best to learn from.– Some programmer dude
Nov 21 '18 at 17:26