From ed85173a0b669483e35edddd87f605acfd58a851 Mon Sep 17 00:00:00 2001
From: Nilesh Londhe <nilesh@cloudgeni.us>
Date: Wed, 15 Sep 2021 03:49:07 -0700
Subject: [PATCH] Update fork_102.md (#151)

This include is needed

```
#include <unistd.h>
```
---
 exercises/os/fork_102.md | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/exercises/os/fork_102.md b/exercises/os/fork_102.md
index 6ad5408..c41dd6d 100644
--- a/exercises/os/fork_102.md
+++ b/exercises/os/fork_102.md
@@ -4,13 +4,14 @@ Answer the questions given the following program (without running it):
 
 ```
 #include<stdio.h>
+#include <unistd.h> 
 
 int main()
 {
-fork();
-fork();
-printf("\nyay\n");
-return 0;
+  fork();
+  fork();
+  printf("\nyay\n");
+  return 0;
 }
 ```