diff --git a/test/layer1_API.cpp b/test/layer1_API.cpp
index dcc80b6..1a569f6 100644
--- a/test/layer1_API.cpp
+++ b/test/layer1_API.cpp
@@ -17,38 +17,66 @@ int main(int argc, char *argv[]) {
     H->rawdisk_read((1) * SECTOR_SIZE, buffer, sizeof(buffer));
     u_int64_t t = 0;
     for (int j = 0; j < 8; j++) 
-        t |= ((u_int64_t)buffer[j]) << (8 * j);
+        t |= ((u_int64_t)(unsigned char)buffer[j]) << (8 * j);
 
     assert(t == 2);
     //test the number before end of inode 524286
     H->rawdisk_read((MAX_INODE - 2) * SECTOR_SIZE, buffer, sizeof(buffer));
     t = 0;
     for (int j = 0; j < 8; j++) 
-        t |= ((u_int64_t)buffer[j]) << (8 * j);
-
+        t |= ((u_int64_t)(unsigned char)buffer[j]) << (8 * j);
+    
+    fprintf(stderr,"[t %llu,%d]\n",t,__LINE__);
     assert(t == MAX_INODE - 1);
     //test the end of inode 1~524287
     H->rawdisk_read((MAX_INODE - 1) * SECTOR_SIZE, buffer, sizeof(buffer));
     t = 0;
     for (int j = 0; j < 8; j++) 
-        t |= ((u_int64_t)buffer[j]) << (8 * j);
+        t |= ((u_int64_t)(unsigned char)buffer[j]) << (8 * j);
 
     assert(t == 0);
     //test the begining of datablock
     H->rawdisk_read((MAX_INODE) * SECTOR_SIZE, buffer, sizeof(buffer));
     t = 0;
     for (int j = 0; j < 8; j++) 
-        t |= ((u_int64_t)buffer[j]) << (8 * j);
+        t |= ((u_int64_t)(unsigned char)buffer[j]) << (8 * j);
 
     assert(t == (MAX_INODE+2048*8)*SECTOR_SIZE);
     //test the end of the datablock
     H->rawdisk_read((MAX_BLOCKNUM - 2048*8) * SECTOR_SIZE, buffer, sizeof(buffer));
     t = 0;
     for (int j = 0; j < 8; j++) 
-        t |= ((u_int64_t)buffer[j]) << (8 * j);
+        t |= ((u_int64_t)(unsigned char)buffer[j]) << (8 * j);
 
     assert(t == (MAX_BLOCKNUM)*SECTOR_SIZE);
+    //initialize
+    int inode_list[20] = {0};
+    printf("Allocate 20 inode num:{");
+    for(int i=0;i<20;i++){
+        inode_list[i] = inop.inode_allocate(*H);
+        printf(" %d", inode_list[i]);
+    }
+    printf("}\n");
+    //free the last 10
+    printf("Free: inode num:{");
+    for(int i=10;i<20;i++){
+        inop.inode_free(*H,inode_list[i]);
+        printf(" %d", inode_list[i]);
+    }
+    printf("}\n");
+    //allocate again the last 10
+    printf("Allocate again: inode num:{");
+    for(int i=10;i<20;i++){
+        inode_list[i] = inop.inode_allocate(*H);
+        printf(" %d", inode_list[i]);
+    }
+    printf("}\n");
 
+    printf("The status 20 inode num:{");
+    for(int i=0;i<20;i++){
+        printf(" %d", inode_list[i]);
+    }
+    printf("}\n");
     delete H;  // Delete the RawDisk object
 
     return 0;