交换角词和反转中间字符

编写一个Java程序以获取输入字符串并交换第一个和最后一个单词并反转中间单词。

例子：

Input : Hello World GFG Welcomes You
Output :You semocleW GFG dlroW Hello

方法：

• 首先我们取两个空字符串，第一个字符串取第一个单词，第二个字符串取最后一个单词
• 当我们迭代每个单词时，我们必须注意指向除最后一个单词之外的下一个单词的变量。
• 现在我们反转给定字符串中的左字符串。
• 在上述过程之后，我们首先打印左字符串的最后一个单词和反转，然后是第一个单词。

C++

// C++ Program to illustrate the solution
// of above problem
#include 
using namespace std;
 
void print(string s)
{
         
    // Taking an Empty String
    string fst = "";
    int i = 0;
    for (i = 0; i < s.length();) {
 
        // Iterating from starting index
        // When we get space, loop terminates
        while (s[i] != ' ') {
            fst = fst + s[i];
            i++;
        }
 
        // After getting one Word
        break;
    }
 
    // Taking an Empty String
    string last = "";
    int j = 0;
    for (j = s.length() - 1; j >= i;) {
 
        // Iterating from last index
        // When we get space, loop terminates
        while (s[j] != ' ') {
            last = s[j] + last;
            j--;
        }
 
        // After getting one Word
        break;
    }
 
    // Printing last word
    cout<= i; m--) {
 
        // Reversing the left characters
        cout<

---

Java

// Java Program to illustrate the solution of above problem
public class ExchangeFirstLastReverseMiddle {
    static void print(String s)
    {
        // Taking an Empty String
        String fst = "";
        int i = 0;
        for (i = 0; i < s.length();) {
 
            // Iterating from starting index
            // When we get space, loop terminates
            while (s.charAt(i) != ' ') {
                fst = fst + s.charAt(i);
                i++;
            }
 
            // After getting one Word
            break;
        }
 
        // Taking an Empty String
        String last = "";
        int j = 0;
        for (j = s.length() - 1; j >= i;) {
 
            // Iterating from last index
            // When we get space, loop terminates
            while (s.charAt(j) != ' ') {
                last = s.charAt(j) + last;
                j--;
            }
 
            // After getting one Word
            break;
        }
 
        // Printing last word
        System.out.print(last);
        for (int m = j; m >= i; m--) {
 
            // Reversing the left characters
            System.out.print(s.charAt(m));
        }
 
        // Printing the first word
        System.out.println(fst);
    }
 
    public static void main(String[] args)
    {
        String s = "Hello World GFG Welcomes You";
        print(s);
    }
}

Python3

# Python3 Program to illustrate the solution
# of above problem
def Print(s) :
         
    # Taking an Empty String
    fst = ""
    i = 0
    while(i < len(s)) :
 
        # Iterating from starting index
        # When we get space, loop terminates
        while (s[i] != ' ') :
            fst = fst + s[i]
            i += 1
 
        # After getting one Word
        break
 
    # Taking an Empty String
    last = ""
    j = len(s) - 1
    while(j >= i) :
 
        # Iterating from last index
        # When we get space, loop terminates
        while (s[j] != ' ') :
            last = s[j] + last
            j -= 1
 
        # After getting one Word
        break
 
    # Printing last word
    print(last, end = "")
    m = j
    while m >= i :
       
        # Reversing the left characters
        print(s[m] , end = "")
        m -= 1
 
    # Printing the first word
    print(fst, end = "")
 
# Driver code
s = "Hello World GFG Welcomes You"
Print(s)
 
# This code is contributed by divyeshrabadiya07

C#

// C# Program to illustrate the
//solution of above problem
using System;
 
class ExchangeFirstLastReverseMiddle
{
    static void print(string s)
    {
        // Taking an Empty String
        string fst = "";
        int i = 0;
        for (i = 0; i < s.Length;) {
 
            // Iterating from starting index
            // When we get space, loop terminates
            while (s[i] != ' ')
            {
                fst = fst + s[i];
                i++;
            }
 
            // After getting one Word
            break;
        }
 
        // Taking an Empty String
        string last = "";
        int j = 0;
        for (j = s.Length - 1; j >= i;) {
 
            // Iterating from last index
            // When we get space, loop terminates
            while (s[j] != ' ') {
                last = s[j] + last;
                j--;
            }
 
            // After getting one Word
            break;
        }
 
        // Printing last word
        Console.Write(last);
        for (int m = j; m >= i; m--) {
 
            // Reversing the left characters
            Console.Write(s[m]);
        }
 
        // Printing the first word
        Console.Write(fst);
    }
 
    // Driver code
    public static void Main()
    {
        string s = "Hello World GFG Welcomes You";
        print(s);
    }
}
 
//This code is contributed by vt_m

输出：

You semocleW GFG dlroW Hello