diff --git a/problems/LabZero.cpp b/problems/LabZero.h
similarity index 86%
rename from problems/LabZero.cpp
rename to problems/LabZero.h
index 66be86a5ad6693f90cf9128302f15e2c18c9070b..85c44a1d99409e757c277770a34cfec41154a30f 100644
--- a/problems/LabZero.cpp
+++ b/problems/LabZero.h
@@ -14,9 +14,7 @@
  * gamma: 90
  * 1.41421
  */
-void labZero_pZero()  {
-    // YOUR CODE HERE
-}
+void labZero_pZero();
 
 
 
@@ -36,9 +34,7 @@ void labZero_pZero()  {
  * Please enter the second time: 0900
  * 15 hours 30 minutes
  */
-void labZero_pOne()  {
-    // YOUR CODE HERE
-}
+void labZero_pOne();
 
 
 /**
@@ -49,9 +45,7 @@ void labZero_pOne()  {
  * Please enter the number:  123456
  * 21
  */
-void labZero_pTwo()  {
-    // YOUR CODE HERE
-}
+void labZero_pTwo();
 
 
 
@@ -67,9 +61,7 @@ void labZero_pTwo()  {
  * 1 2 3 4
  * in order
  */
-void labZero_pThree()  {
-    // YOUR CODE HERE
-}
+void labZero_pThree();
 
 /**
  * @input  read in four pairs of integral x y coordinates, one per line.
@@ -91,9 +83,7 @@ void labZero_pThree()  {
  * 1 1
  * trapezoid
  */
-void labZero_pFour()  {
-    // YOUR CODE HERE
-}
+void labZero_pFour();
 
 /**
  * @input  read in a positive integer.
@@ -108,6 +98,4 @@ void labZero_pFour()  {
  * 1978
  * MCMLXXVIII
  */
-void labZero_pFive()  {
-    // YOUR CODE HERE
-}
\ No newline at end of file
+void labZero_pFive();
\ No newline at end of file