adding buffer overflow example

buffer_overflow_example/README.md

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+# Buffer Overflow Example
+***DO NOT USE THIS CODE METHODOLOGY***
+This is an example of a very bad coding practice that introduces a buffer overflow.
+
+```
+#include <stdio.h>
+
+void secretFunction()
+{
+    printf("Omar's Crappy Function\n");
+    printf("This is a super secret function!\n");
+}
+
+void echo()
+{
+    char buffer[20];
+
+    printf("Please enter your name:\n");
+    scanf("%s", buffer);
+    printf("You entered: %s\n", buffer);    
+}
+
+int main()
+{
+    echo();
+
+    return 0;
+}
+```
+
+The `char buffer[20];` is a really bad idea. The rest will be demonstrated in the course.

buffer_overflow_example/bad_code.c

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+#include <stdio.h>
+
+void secretFunction()
+{
+    printf("Omar's Crappy Function\n");
+    printf("This is a super secret function!\n");
+}
+
+void echo()
+{
+    char buffer[20];
+
+    printf("Please enter your name below:\n");
+    scanf("%s", buffer);
+    printf("You entered: %s\n", buffer);    
+}
+
+int main()
+{
+    echo();
+
+    return 0;
+}