diff --git a/test_01.c b/test_01.c
index b9025da..37cc2bc 100644
--- a/test_01.c
+++ b/test_01.c
@@ -3,14 +3,22 @@
 
 int main()
 {
-    char name [50] = "ccchien"; // name[0] ......name[49]
-                                // name[0] = c, name[1] = c, name[2] = c
+    int i ;
+	char name [50] = "ccchien"; // name[0] ......name[49]
+                                // name[0] = c, name[1] = c, name[2] = c, 到出現name[x] = \0就跳出來 
 	printf("hello world\n");
 	printf("%d\n", 2+3);
 	printf("%f\n", 1.2+2.5);
 	printf("%.16f\n", cos(2.0*M_PI/3.0));
 	printf("%s\n", name) ;
-	printf("%c\n", name[4]);
+	printf("-------------------------------\n");
+	printf("%u\n", name) ;
+	printf("%c\n", name[5]);
+	printf("%s\n", name+3);
+	for(i=0;i<50;++i)
+	{
+		printf("%d : %c - %u\n", i, name[i], name[i] ) ; 
+	}
 
 	return 0;
 }