day9接口 练习7.10

src/study/day9Interface/Practice/7.10.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+)
+
+func IsPalindrome(s sort.Interface) bool {
+	for i, j := 0, s.Len()-1; i < j; i, j = i+1, j-1 {
+		if s.Less(i, j) || s.Less(j, i) {
+			return false
+		}
+	}
+	return true
+}
+
+func StrToSlice(str string) []string {
+	return strings.Split(str, "")
+}
+
+func IntToSlice(num int) []int {
+	var s []int
+	for num > 0 {
+		s = append(s, num%10)
+		num /= 10
+	}
+	return s
+}
+
+func main() {
+	var str = "abcdcba"
+	// 将字符串转为[]string
+	s := StrToSlice(str)
+	fmt.Println(str, ":", IsPalindrome(sort.StringSlice(s))) // abcdcba : true
+
+	var num = 123321
+	// 将数字转为[]int
+	nums := IntToSlice(num)
+	fmt.Println(num, ":", IsPalindrome(sort.IntSlice(nums))) // 123321 : true
+
+	num = 123456
+	nums = IntToSlice(num)
+	fmt.Println(num, ":", IsPalindrome(sort.IntSlice(nums))) // 123456 : false
+}