Debug.

insertInTail() and findByValue() has been tested and modified.
It seems that both of them work fine now.

list/list.c

@@ -4,11 +4,23 @@
  * This file create by saturneric at 20:04 on Feb 7th.
  * *******************************************************/
 
-#include <stdio.h>
-#include <stdlib.h>
 #include "list.h"
 
 int main(int argc, char **argv){	
+	rand_init();
+	List *t_list = init_list();
+	
+	for(int i = 0; i < 9; i++){
+		Node *t_node = init_node();
+		int *t_i = (int *)malloc(sizeof(int));
+		*t_i = i;
+		init_value(t_node,(void *)t_i);
+		insertInTail(t_list,t_node);
+	}
+	int *f_i = (int *)malloc(sizeof(int));
+	*f_i = 3;
+	Node *f_node = findByValue(t_list,"int",(void *)f_i);
+	releaseList(t_list);
 		
 	return 0;
 }

list/list.h

@@ -1,3 +1,8 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
 typedef struct Node{
 	unsigned long long id;
 	void *value;
@@ -17,6 +22,7 @@ int releaseAll(void);
 List *init_list(void);
 Node *init_node(void);
 int init_value(Node *,void *);
+void init_rand(void);
 
 unsigned long long getId(void);
 
@@ -94,13 +100,16 @@ int init_value(Node *p_node,void * p_value){
 	return 0;
 }
 
+void rand_init(void){
+	srand((unsigned)time(NULL));
+}
+
 unsigned long long getId(void){
 	unsigned long long id = 0;
-	srand(time(0));
+	id = ((random()%9)+1);
-	id = ((random()%9)+1)*10;
+	for(int i = 0; i < 15; i++){
-	for(int i = 0; i < 18; i++){
-		id = random()%10;
 		id *= 10;
+		id += random()%10;
 	}
 	return id;
 }
@@ -116,6 +125,7 @@ int insertInHead(List *p_list, Node *p_node){
 		p_node->next = p_list->head;
 		p_list->head = p_node;
 	}
+	p_list->length += 1;
 	return 0;
 }
 
@@ -130,6 +140,7 @@ int insertInTail(List *p_list, Node *p_node){
 		p_node->last = p_list->tail;
 		p_list->tail = p_node;
 	}
+	p_list->length += 1;
 	return 0;
 }
 
@@ -265,12 +276,12 @@ Node *findByValue(List *p_list, const char *type, const void *value){
 	Node *p_node = p_list->head;
 	while(p_node != NULL){
 		if(!strcmp(type,"int")){
-			if(*((int *)p_node) == *((int *)value)){
+			if(*((int *)p_node->value) == *((int *)value)){
 				return p_node;
 			}
 		}
 		else if(!strcmp(type,"double")){
-			if(*((double *)p_node) == *((double *)value)){
+			if(*((double *)p_node->value) == *((double *)value)){
 				return p_node;
 			}
 		}
@@ -280,9 +291,8 @@ Node *findByValue(List *p_list, const char *type, const void *value){
 				return p_node;
 			}
 		}
-		else{
+		
-			return NULL;
+		p_node = p_node->next;
-		}
 		
 	}
 	return NULL;