1 files changed, 25 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/OR_PRACTICAL_C/05_1.c b/reference/C/CONTRIB/OR_PRACTICAL_C/05_1.c
new file mode 100644
index 0000000..6b5e8f2
--- /dev/null
+++ b/reference/C/CONTRIB/OR_PRACTICAL_C/05_1.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+int   old_number;     /* previous Fibonacci number */
+
+int   current_number; /* current Fibonacci number */
+
+int   next_number;    /* next number in the series */
+
+main()
+{
+    /* start things out */
+    old_number = 1;
+    current_number = 1;
+
+    (void)printf("1\n");    /* Print first number */
+
+    while (current_number < 100) {
+
+        (void) printf("%d\n", current_number);
+        next_number = current_number + old_number;
+
+        old_number = current_number;
+        current_number = next_number;
+    }
+    return (0);
+}