Merge pull request #727 from openset/develop

Add: Hexspeak

Author: Shuo

problems/hexspeak/hexspeak.go

@@ -0,0 +1,19 @@
+package problem1271
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func toHexspeak(num string) string {
+	n, _ := strconv.Atoi(num)
+	hex := fmt.Sprintf("%X", n)
+	hex = strings.NewReplacer("0", "O", "1", "I").Replace(hex)
+	for _, v := range hex {
+		if v < 'A' {
+			return "ERROR"
+		}
+	}
+	return hex
+}

problems/hexspeak/hexspeak_test.go

@@ -0,0 +1,27 @@
+package problem1271
+
+import "testing"
+
+type testType struct {
+	in   string
+	want string
+}
+
+func TestToHexspeak(t *testing.T) {
+	tests := [...]testType{
+		{
+			in:   "257",
+			want: "IOI",
+		},
+		{
+			in:   "3",
+			want: "ERROR",
+		},
+	}
+	for _, tt := range tests {
+		got := toHexspeak(tt.in)
+		if got != tt.want {
+			t.Fatalf("in: %v, got: %v, want: %v", tt.in, got, tt.want)
+		}
+	}
+}