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Treesort [string array]
Posted Date: 12 Jun 2008 Resource Type: Articles/Knowledge Sharing Category: Computer & Technology
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Posted By: Lenin Member Level: Diamond
Rating:  Points: 1
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Treesort [string array]
#include
#include
#include
struct tnode {
char *str;
struct tnode *left;
struct tnode *right;
};
void insert(struct tnode **p, char *value);
void print(struct tnode *root);
int main(void) {
char line[1024];
struct tnode *root;
root = NULL;
while((fgets(line, 1024, stdin)) != NULL)
insert(&root, line);
print(root);
return 0;
}
/* call by reference .. ! */
void insert(struct tnode **p, char *value) {
if(!*p) {
*p = (struct tnode *)malloc(sizeof(struct tnode));
(*p)->left = (*p)->right = NULL;
(*p)->str = strdup(value);
return;
}
if(strcmp(value, (*p)->str) < 0)
insert(&(*p)->left, value);
else
insert(&(*p)->right, value);
}
/* inorder binary tree print ... */
void print(struct tnode *root) {
if(root != NULL) {
print(root->left);
printf("%s", root->str);
print(root->right);
}
}
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