diff -Naur main-0.1/cos_value.c main-0.2/cos_value.c
--- main-0.1/cos_value.c	2015-09-04 14:46:59.200444001 +0800
+++ main-0.2/cos_value.c	2015-09-04 14:47:10.215444000 +0800
@@ -7,5 +7,5 @@
 {
 	float value;
 	value = cos ( angle / 180. * pi );
-	printf ("The Cos is: %5.2f\n",value);
+	printf ("The cos(%f) is: %5.2f\n",angle, value);
 }
diff -Naur main-0.1/main.c main-0.2/main.c
--- main-0.1/main.c	2009-06-12 00:39:38.000000000 +0800
+++ main-0.2/main.c	2009-06-12 00:45:38.000000000 +0800
@@ -5,7 +5,7 @@
 
 int main(void)
 {
-	printf ("\nversion 0.1");
+	printf ("\nversion 0.2");
 	printf ("\n\nPlease input your name: ");
 	scanf  ("%s", &name );
 	printf ("\nPlease enter the degree angle (ex> 90): " );
diff -Naur main-0.1/Makefile main-0.2/Makefile
--- main-0.1/Makefile	2009-06-12 00:34:53.000000000 +0800
+++ main-0.2/Makefile	2009-06-12 00:42:39.000000000 +0800
@@ -1,8 +1,12 @@
 # This make file is a test rule file
-# Version 0.1 2009/06/06
+# Version 0.2 2009/06/11
 LIBS = -lm
 OBJS = main.o haha.o sin_value.o cos_value.o
 main: ${OBJS}
 	gcc -o main ${OBJS} ${LIBS}
 clean:
 	rm -f main ${OBJS}
+install:
+	cp -a main /usr/local/bin
+uninstall:
+	rm -f /usr/local/bin/main
diff -Naur main-0.1/sin_value.c main-0.2/sin_value.c
--- main-0.1/sin_value.c	2015-09-04 14:46:52.286444001 +0800
+++ main-0.2/sin_value.c	2015-09-04 14:47:17.665444020 +0800
@@ -7,5 +7,5 @@
 {
 	float value;
 	value = sin ( angle / 180. * pi );
-	printf ("\nThe Sin is: %5.2f\n",value);
+	printf ("\nThe sin(%f) is: %5.2f\n",angle, value);
 }
