fix: coding style and file format for chapter 11, 12, 13, 14 and 15.

2025-08-12 04:48:29 +08:00 · 2017-02-11 12:32:16 +08:00
parent c5413075c1
commit 4abbfabb52
63 changed files with 2662 additions and 2622 deletions
--- a/eBook/exercises/chapter_15/statistics.go
+++ b/eBook/exercises/chapter_15/statistics.go
@@ -1,110 +1,110 @@
-// statistics.go
-package main
-
-import (
-	"fmt"
-	"net/http"
-	"sort"
-	"strings"
-	"strconv"
-	"log"
-)
-
-type statistics struct {
-	numbers []float64
-	mean    float64
-	median  float64
-}
-
-const  form = `<html><body><form action="/" method="POST">
-<label for="numbers">Numbers (comma or space-separated):</label><br>
-<input type="text" name="numbers" size="30"><br />
-<input type="submit" value="Calculate">
-</form></html></body>`
-
-const error = `<p class="error">%s</p>`
-
-var pageTop = ""
-var pageBottom = ""
-
-func main() {
-	http.HandleFunc("/", homePage)
-    if err := http.ListenAndServe(":9001", nil); err != nil {
-        log.Fatal("failed to start server", err)
-    }
-}
-
-func homePage(writer http.ResponseWriter, request *http.Request) {
-	writer.Header().Set("Content-Type", "text/html")
-    err := request.ParseForm() // Must be called before writing response
-    fmt.Fprint(writer, pageTop, form)
-	if err != nil {
-		       fmt.Fprintf(writer, error, err)
-    } else {
-       if numbers, message, ok := processRequest(request); ok {
-           stats := getStats(numbers)
-           fmt.Fprint(writer, formatStats(stats))
-       } else if message != "" {
-           fmt.Fprintf(writer, error, message)
-       }
-   }
-   fmt.Fprint(writer, pageBottom)
-}
-
-func processRequest(request *http.Request) ([]float64, string, bool) {
-    var numbers []float64
-    var text string
-    if slice, found := request.Form["numbers"]; found && len(slice) > 0 {
-        //处理如果网页中输入的是中文逗号
-	if strings.Contains(slice[0], "&#65292") {
-	    text = strings.Replace(slice[0], "&#65292;", " ", -1)
-	} else {
-	    text = strings.Replace(slice[0], ",", " ", -1)
-	}
-        for _, field := range strings.Fields(text) {
-            if x, err := strconv.ParseFloat(field, 64); err != nil {
-                return numbers, "'" + field + "' is invalid", false
-            } else {
-                numbers = append(numbers, x)
-            }
-        }
-    }
-    if len(numbers) == 0 {
-        return numbers, "", false // no data first time form is shown
-    }
-    return numbers, "", true
-}
-
-func getStats(numbers []float64) (stats statistics) {
-	stats.numbers = numbers
-	sort.Float64s(stats.numbers)
-	stats.mean = sum(numbers) / float64(len(numbers))
-	stats.median = median(numbers)
-	return
-}
-
-func sum(numbers []float64) (total float64) {
-	for _, x := range numbers {
-		total += x
-	}
-	return
-}
-
-func median(numbers []float64) float64 {
-	middle := len(numbers)/2
-	result := numbers[middle]
-	if len(numbers)%2 == 0 {
-		result = (result + numbers[middle-1]) / 2
-	}
-	return result
-}
-
-func formatStats(stats statistics) string {
-    return fmt.Sprintf(`<table border="1">
-<tr><th colspan="2">Results</th></tr>
-<tr><td>Numbers</td><td>%v</td></tr>
-<tr><td>Count</td><td>%d</td></tr>
-<tr><td>Mean</td><td>%f</td></tr>
-<tr><td>Median</td><td>%f</td></tr>
-</table>`, stats.numbers, len(stats.numbers), stats.mean, stats.median)
-}
+// statistics.go
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+type statistics struct {
+	numbers []float64
+	mean    float64
+	median  float64
+}
+
+const form = `<html><body><form action="/" method="POST">
+<label for="numbers">Numbers (comma or space-separated):</label><br>
+<input type="text" name="numbers" size="30"><br />
+<input type="submit" value="Calculate">
+</form></html></body>`
+
+const error = `<p class="error">%s</p>`
+
+var pageTop = ""
+var pageBottom = ""
+
+func main() {
+	http.HandleFunc("/", homePage)
+	if err := http.ListenAndServe(":9001", nil); err != nil {
+		log.Fatal("failed to start server", err)
+	}
+}
+
+func homePage(writer http.ResponseWriter, request *http.Request) {
+	writer.Header().Set("Content-Type", "text/html")
+	err := request.ParseForm() // Must be called before writing response
+	fmt.Fprint(writer, pageTop, form)
+	if err != nil {
+		fmt.Fprintf(writer, error, err)
+	} else {
+		if numbers, message, ok := processRequest(request); ok {
+			stats := getStats(numbers)
+			fmt.Fprint(writer, formatStats(stats))
+		} else if message != "" {
+			fmt.Fprintf(writer, error, message)
+		}
+	}
+	fmt.Fprint(writer, pageBottom)
+}
+
+func processRequest(request *http.Request) ([]float64, string, bool) {
+	var numbers []float64
+	var text string
+	if slice, found := request.Form["numbers"]; found && len(slice) > 0 {
+		//处理如果网页中输入的是中文逗号
+		if strings.Contains(slice[0], "&#65292") {
+			text = strings.Replace(slice[0], "&#65292;", " ", -1)
+		} else {
+			text = strings.Replace(slice[0], ",", " ", -1)
+		}
+		for _, field := range strings.Fields(text) {
+			if x, err := strconv.ParseFloat(field, 64); err != nil {
+				return numbers, "'" + field + "' is invalid", false
+			} else {
+				numbers = append(numbers, x)
+			}
+		}
+	}
+	if len(numbers) == 0 {
+		return numbers, "", false // no data first time form is shown
+	}
+	return numbers, "", true
+}
+
+func getStats(numbers []float64) (stats statistics) {
+	stats.numbers = numbers
+	sort.Float64s(stats.numbers)
+	stats.mean = sum(numbers) / float64(len(numbers))
+	stats.median = median(numbers)
+	return
+}
+
+func sum(numbers []float64) (total float64) {
+	for _, x := range numbers {
+		total += x
+	}
+	return
+}
+
+func median(numbers []float64) float64 {
+	middle := len(numbers) / 2
+	result := numbers[middle]
+	if len(numbers)%2 == 0 {
+		result = (result + numbers[middle-1]) / 2
+	}
+	return result
+}
+
+func formatStats(stats statistics) string {
+	return fmt.Sprintf(`<table border="1">
+<tr><th colspan="2">Results</th></tr>
+<tr><td>Numbers</td><td>%v</td></tr>
+<tr><td>Count</td><td>%d</td></tr>
+<tr><td>Mean</td><td>%f</td></tr>
+<tr><td>Median</td><td>%f</td></tr>
+</table>`, stats.numbers, len(stats.numbers), stats.mean, stats.median)
+}