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-rw-r--r--Tests/Tutorial/Step4/tutorial.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/Tests/Tutorial/Step4/tutorial.cxx b/Tests/Tutorial/Step4/tutorial.cxx
index e1f9cd8..82b416f 100644
--- a/Tests/Tutorial/Step4/tutorial.cxx
+++ b/Tests/Tutorial/Step4/tutorial.cxx
@@ -1,5 +1,6 @@
// A simple program that computes the square root of a number
#include <stdio.h>
+#include <stdlib.h>
#include <math.h>
#include "TutorialConfig.h"