互换角字，反转中间字符
原文:https://www . geesforgeks . org/swap-corner-word-reverse-middle-characters/
编写一个 Java 程序，获取一个输入字符串，交换第一个和最后一个单词，并反转中间的单词。
示例:
Input : Hello World GFG Welcomes You
Output :You semocleW GFG dlroW Hello
方法:
- We first take two empty strings, the first string takes the first word, and the second string takes the last word.
- When we iterate over each word, we must pay attention to the variables that point to the next word except the last word.
- Now we reverse the left string in the given string.
- After the above process, we first print the last word and the reverse of the left string, and then print the first word.
c++
// C++ Program to illustrate the solution
// of above problem
#include <iostream>
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<<last;
for (int m = j; m >= i; m--) {
// Reversing the left characters
cout<<s[m];
}
// Printing the first word
cout<<fst;
}
int main() {
string s = "Hello World GFG Welcomes You";
print(s);
return 0;
}
//This code is contributed by vt_m.
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);
}
}
python 3
# 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
T33】
输出:
You semocleW GFG dlroW Hello
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