1 files changed, 12 insertions, 0 deletions
diff --git a/reference/C/EXAMPLES/ifndef.c b/reference/C/EXAMPLES/ifndef.c
new file mode 100644
index 0000000..5fee1da
--- /dev/null
+++ b/reference/C/EXAMPLES/ifndef.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+					/* Create NULL if NULL was not 
+					 * created by stdio.h 		*/
+#ifndef NULL
+   #define NULL '\0'
+#endif
+
+main()
+{
+  printf("%c \n", NULL);
+}