文件夹加密工具(开源代码) 软件作者：dyforc 发现文件夹加密的软件较少

				#include "map.h"
				
				void MapAssign(Map *pmap, char *str, char *value)
				{
					int cmp;
				
					if(pmap == NULL)
						return;
					if(*pmap == NULL){
						if((*pmap = (Map)malloc(sizeof(MapNode))) == NULL){
							fprintf(stderr, "Failed to allocate map node.\n");
							return;
						}
						(*pmap)->str = strdup(str);
						(*pmap)->value = strdup(value);
						(*pmap)->left = NULL;
						(*pmap)->right = NULL;
					}else{
						cmp = strcmp(str, (*pmap)->str);
						if(cmp == 0){
							free(value);
							value = strdup(value);
						}else if(cmp < 0)
							MapAssign(&(*pmap)->left, str, value);
						else
							MapAssign(&(*pmap)->right, str, value);
					}
				}
				
				char* MapFind(Map map, char *str)
				{
					int cmp;
					
					if(map == NULL || str == NULL)
						return NULL;
					cmp = strcmp(str, map->str);
					if(cmp == 0)
						return map->value;
					if(cmp < 0)
						return MapFind(map->left, str);
					return MapFind(map->right, str);
				}
				
				void MapClear(Map map)
				{
					if(map == NULL)
						return;
					if(map->left)
						MapClear(map->left);
					if(map->right)
						MapClear(map->right);
					if(map->str)
						free(map->str);
					if(map->value)
						free(map->value);
					free(map);
				}