all tasks

Task/Trabb-Pardo-Knuth-algorithm/Go/trabb-pardo-knuth-algorithm.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+    "fmt"
+    "log"
+    "math"
+)
+
+func main() {
+    // prompt
+    fmt.Print("Enter 11 numbers: ")
+    // accept sequence
+    var s [11]float64
+    for i := 0; i < 11; {
+        if _, err := fmt.Scanf("%f", &s[i]); err == nil {
+            i++
+        }
+    }
+    // reverse sequence
+    for i, item := range s[:5] {
+        s[i], s[10-i] = s[10-i], item
+    }
+    // iterate
+    for _, item := range s {
+        if result, overflow := f(item); overflow {
+            // send alerts to stderr
+            log.Printf("f(%g) overflow", item)
+        } else {
+            // send normal results to stdout
+            fmt.Printf("f(%g) = %g\n", item, result)
+        }
+    }
+}
+
+func f(x float64) (float64, bool) {
+    result := math.Pow(math.Abs(x), .5) + 5*x*x*x
+    return result, result > 400
+}