Stdlib header file cleanup

test/civic.h

@@ -1,8 +1,13 @@
+#ifndef __CIVIC_H
+#define __CIVIC_H
+
 extern void printInt(int val);
 extern void printFloat(float val);
 
-extern int scanInt(); 
+extern int scanInt();
 extern float scanFloat();
 
 extern void printSpaces(int num);
-extern void printNewlines(int num); 
+extern void printNewlines(int num);
+
+#endif  // __CIVIC_H