added more code

CPE435/Lab1/demo_1.cpp

@@ -0,0 +1,19 @@
+using namespace std;
+#include <iostream>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+int main(int argc, char * argv[])
+{
+	pid_t c_pid;
+	cout << "The pid of the parent is " << getpid() << endl;
+	c_pid = fork();
+	if (c_pid == 0 ) /* we are the child */
+	{
+		cout << "I am the child, my parents pid was " << getppid() << endl;
+		exit(0);
+	}
+	cout << "I am the parent, the child's pid is " << c_pid << endl;
+
+	exit(0);
+}

CPE435/Lab1/demo_2.cpp

@@ -0,0 +1,17 @@
+/* This program illustrates the use of fork */
+
+#include <stdio.h>
+#include <iostream>
+#include <unistd.h>
+using namespace std;
+
+int main()
+{
+	int x;
+	x = 0;
+	fork();
+	x++;
+	// This should be printed twice, once by the parent and once by the child
+	cout << "I am process "<< getpid() << " and my x is " << x << endl;
+	return 0;
+}

CPE435/Lab1/demo_3.cpp

@@ -0,0 +1,18 @@
+/* This program illustrates multiple fork operations */
+
+#include <stdio.h>
+#include <iostream>
+#include <stdlib.h>
+#include <unistd.h>
+
+using namespace std;
+
+int main()
+{
+	printf("I am the Parent\n");
+	fork();
+	printf("This is printed by both parent and child\n");
+	fork();
+	printf("This will be printed 4 times\n");
+	return 0;
+}

CPE435/Lab1/demo_4.cpp

@@ -0,0 +1,25 @@
+/* This program illustrates the death of the parent process before the child is terminated. */
+/* The child process is now considered an orphan process since the parent is dead. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main()
+{
+	int pid;
+	pid = fork();
+	if (pid == 0)
+	{
+		printf("I am the child, my ID is %d\n", getpid());
+		printf("I am the child, my parent is %d\n", getppid());
+		printf("The child will now sleep for 10 seconds\n");
+		sleep(10);
+		printf("I am the same child with ID %d, but my parent Id is %d\n", getpid(), getppid());
+	}
+	else
+	{
+		printf("I am the parent with ID %d. My parent is %d and my child is %d\n", getpid(), getppid(), pid);
+		sleep(5);
+	}
+}

CPE435/Lab1/lab1.cpp

@@ -0,0 +1,20 @@
+using namespace std;
+#include <iostream>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+int main(int argc, char * argv[])
+{
+	pid_t x;
+	cout << "The pid of the parent is " << getpid() << endl;
+    for(int i=0; i<10; i++){
+        x = fork();
+	    if (x == 0 ) /* we are the child */
+	    {
+		    cout << "Id: " << getpid() << "\tX:  x "<< endl;
+		    exit(0);
+	    }
+	   // cout << "I am the parent, the child's pid is " << x << endl;
+    }
+	exit(0);
+}

CPE435/Lab1/lab1Questions.txt

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+Question 1: The processes' PIDs are different each time the program is run, and both processes differ by 1.
+2: Four are running.
+3: