Added comments and help commands to user apps

count.c

@@ -1,6 +1,8 @@
 #include "types.h"
 #include "user.h"
 
+// Simple user app to do a count from 0 to the given number (1000 by defaulf)
+// for testing concurrency
 int main(int argc, char *argv[]) {
     int countto = 1000;    
         
@@ -8,6 +10,15 @@ int main(int argc, char *argv[]) {
         if (strcmp(argv[i],  "-c") == 0) {
             countto = atoi(argv[i + 1]);            
         }
+        else if (strcmp(argv[i],  "-help") == 0)
+        {
+            printf(1, "Counts from 0 to the given number.\n");
+            printf(1, "Default: 1000\n");
+            printf(1, "Options:\n");
+            printf(1, "-c [Number] : Sets the value to count upto.\n");
+            exit();
+            return 0;
+        }
     }
 
     cls();