adding cs142 code

cs142/smcquay/go/lab02/seconds/Makefile

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

cs142/smcquay/go/lab02/seconds/seconds.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+    "fmt"
+    "math"
+)
+
+const SECONDS_PER_HOUR = 3600
+const SECONDS_PER_MINUTE = 60
+
+type time struct {
+    hours int
+    minutes int
+    seconds int
+}
+
+func (t time) String() string {
+    return fmt.Sprintf("%dH:%dM:%dS", t.hours, t.minutes, t.seconds);
+}
+
+func int2time(i int) time {
+    var r_secs int
+    hours := i / SECONDS_PER_HOUR
+    r_secs = i % SECONDS_PER_HOUR
+    mins := r_secs / SECONDS_PER_MINUTE
+    r_secs = r_secs % SECONDS_PER_MINUTE
+    return time{hours, mins, r_secs}
+}
+
+func main() {
+    var seconds int
+    fmt.Print("please enter total seconds: ")
+    fmt.Scan(&seconds)
+    fmt.Printf("%v\n", int2time(seconds))
+    fmt.Printf("%v\n", int2time(int(math.Sqrt(float64(seconds)))))
+}