C语言程序设计教程（第三版）课后习题8.5 （C语言代码）

import java.util.Scanner;//面向过程解决办法（未使用java API）

public class Main {

        public  static String Str(String str){

                char[] StringArr = str.toCharArray();

                char[] tempArr = new char[StringArr.length];

                StringBuffer sb = new StringBuffer();

                for(int i=StringArr.length-1;i>=0;i--){

                        tempArr[StringArr.length-1-i] = StringArr[i];

                }

                for(int i=0;i<str.length();i++){

                        StringArr[i] = tempArr[i];

                        sb.append(StringArr[i]);

                }

                return sb.toString();

        }

        public static void main(String[] arg){

                Scanner sc = new Scanner(System.in);

                String str = sc.next();

                System.out.print(Str(str));

        }

}

//面向对象解决方法，使用java API

import java.util.Scanner;

public class Main {

        public  static String Str(String str){

                StringBuffer sb = new StringBuffer(str);

                String str2 = String.valueOf(sb.reverse());

                return str2;

         }

        public static void main(String[] arg){

                Scanner sc = new Scanner(System.in);

                String str = sc.next();

                System.out.print(Str(str));

        }

}