From 19e9127649b020167cad5d19d8d37c1b062185eb Mon Sep 17 00:00:00 2001
From: yiyingZ <yiying@bluenose.cs.dal.ca>
Date: Tue, 30 Sep 2014 09:14:12 -0300
Subject: [PATCH] Fixes Issues #7 Make the parent wait until child has finished
 before printing results of mean()

---
 mm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm.c b/mm.c
index cb330f2..77e09cf 100644
--- a/mm.c
+++ b/mm.c
@@ -1,6 +1,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <sys/wait.h>
 
 #define debug 0
 
@@ -80,6 +81,9 @@ int main(int argc, char *argv[]) {
       fprintf(stdout, "The median value is %lf.\n",median(pt,length));
     }else if (rc ==1){
       //if rc equal to 1 means fork succeed, the parent is processing
+      //Issues #7 Make the parent wait until child has finished before pring the results of mean()
+      int wc = wait(NULL);
+      printf("I am waiting for my child. wc(:%d)\n",wc);
       //let parent process print the result of mean()
       //Issues#6 Parent process should print the results of mean()
       fprintf(stdout,"This is parent processing!\n");