adding cs142 code

cs142/smcquay/go/lab02/binary/Makefile

@@ -0,0 +1,7 @@
+include $(GOROOT)/src/Make.inc
+
+TARG=binary
+GOFILES=\
+        binary.go
+
+include $(GOROOT)/src/Make.cmd

cs142/smcquay/go/lab02/binary/binary.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+    "fmt"
+)
+
+func itob(i int) string {
+    var buf [64]byte
+    j := len(buf)
+    b := 2
+    for i > 0 {
+        j--
+        buf[j] = "0123456789abcdefghipqrstuvwxyz"[i%b]
+        i /= b
+    }
+
+    return string(buf[j:])
+}
+
+
+func main() {
+    var i int
+    fmt.Print("please enter a number: ")
+    fmt.Scan(&i)
+    fmt.Printf("%d as a binary: %s\n", i, itob(i))
+}