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diff --git a/usr.bin/learn/lib/C/L5.2b b/usr.bin/learn/lib/C/L5.2b
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+++ b/usr.bin/learn/lib/C/L5.2b
@@ -0,0 +1,28 @@
+#print
+(Section 1.5)
+Write a program which reads a character from its
+input and tests whether that character is larger than
+100 in numeric value.  If so, read two more
+characters, and print the value of the second of them
+in octal.  Compile and test your program, then type "ready".
+#once #create Ref1
+u V has value 126
+#once #create Ref2
+. V should not be processed
+#user
+a.out <Ref1 >test1
+a.out <Ref2 >test2
+grep 126 test1 >/dev/null && cmp -s test2 /dev/null
+#succeed
+One way:
+
+main()
+{
+	if (getchar() > 100) {
+		getchar();
+		printf("%o\n", getchar());
+	}
+}
+#log
+#next
+5.1c 10