小程序 - 去字符串空格/二叉树查找

/*
* Remove all the white spaces from a string.
*/
void removeWB(char* str)
{
char* p;

for (p = str; *str; str++)
if (*str != ' ')
*p++ = *str;
*p = '\0';
}

#include <stdio.h>

typedef struct Node {
int val;
struct Node *left, *right;
} Node;

typedef enum {FOUND, NOT_FOUND} EXISTS;

EXISTS exists(Node *root, int target)
{
if (!root)
return NOT_FOUND;
if (root->val == target)
return FOUND;
return (target < root->val)
? exists(root->left, target)
: exists(root->right, target);
}