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diff --git a/usr.bin/learn/lib/C/L17.1c b/usr.bin/learn/lib/C/L17.1c
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+++ b/usr.bin/learn/lib/C/L17.1c
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+#print
+Print the 20 Fibonacci numbers beginning with 2
+(the sequence is 2,3,5,8,... where each number
+is the sum of the immediately preceding pair of numbers.
+Start with the pair 1,1).
+Print each number on a separate line as a five digit
+number (remember %3d in printf? %5d does five digits).
+Compile and test your program; then type "ready".
+#once #create Ref
+    2
+    3
+    5
+    8
+   13
+   21
+   34
+   55
+   89
+  144
+  233
+  377
+  610
+  987
+ 1597
+ 2584
+ 4181
+ 6765
+10946
+17711
+#user
+a.out >xxx
+#cmp xxx Ref
+#succeed
+/*	 one way */
+main()
+{
+	int f1, f2, t, count;
+
+	f1 = 1;
+	f2 = 1;
+	for (count = 0; count < 20; count++) {
+		t = f1+f2;
+		f1 = f2;
+		f2 = t;
+		printf("%5d\n", t);
+	}
+}
+#log
+#next
+18.1a 10