Implemented the exit system call

.gitignore

@@ -10,3 +10,4 @@ examples/libc.a
 examples/my
 # Visual Studio folder
 /.vs
+/CppProperties.json

userprog/syscall_exit.c

 #include "system_calls.h"
-#include "threads/interrupt.h"
+#include "threads/thread.h"
 
-void syscall_exit(struct intr_frame *f) {
-  (void*)0;
+void syscall_exit(struct intr_frame *status) {
+	struct thread *current_thread;	// creates thread struct from thread.h
+	current_thread = thread_current(); // Sets current thread
+
+	current_thread->status = status; // Returning status to kernel
+	thread_exit(); // Exiting current thread
+	return -1; // Returning -1 for success
 }

userprog/system_calls.h

@@ -12,7 +12,7 @@ void syscall_halt(struct intr_frame *f);
  * returned. Conventionally, a status of 0 indicates success and nonzero
  * values indicate errors. 
  */
-void syscall_exit(struct intr_frame *f);
+void syscall_exit(struct intr_frame *status);
 
 /*
  * Runs the executable whose name is given in cmd_line, passing any given