diff --git a/V1/switch.c b/V1/switch.c
index ed448c8..ceab9d4 100644
--- a/V1/switch.c
+++ b/V1/switch.c
@@ -7,24 +7,27 @@
  * 
  * */
 
-#define PIN01 1
-#define PIN12 12
-#define PIN11 11
-#define PIN06 6
-#define IN ((const unsigned char *)"in\n")
-#define OUT ((const unsigned char *)"out\n")
+#define PIN01 ((char *) "1\n")
+#define PIN12 ((char *) "12\n")
+#define PIN11 ((char *) "11\n")
+#define PIN06 ((char *) "6\n")
+#define IN ((char *)"in\n")
+#define OUT ((char *)"out\n")
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
+#include <fcntl.h>
 
-int reserve(char gpioPort)
+int reserve(char* gpioPort)
 {
 	int fd;
 	char buffer[2];
+	printf("%s", gpioPort);	
+	strcpy(buffer, gpioPort );
 	
-	strcpy(buffer, gpioPort + "\n");		
-
-	if((fd=open("/sys/class/gpio/export", O_RDWR | O_CREAT | O_TRUNC) == -1) {
+	if((fd=open("/sys/class/gpio/export", O_RDWR | O_CREAT | O_TRUNC) == -1)) {
 		perror(NULL);
 		return EXIT_FAILURE;
 	}
@@ -45,6 +48,6 @@ int inOut(char gpioPort, char * inOut)
 
 int main()
 {
-  
+  reserve(PIN06);  
   return 0;
 }