检查字符串的第一个字符和最后一个字符是否相等的程序

我们得到一个字符串，我们需要检查字符串str 的第一个和最后一个字符是否相等。需要考虑区分大小写。
例子：

Input  : university 
Output : Not Equal
Explanation: In the string "university", the first character is 'u' 
and the last character is 'y', as they are not equal, "Not Equal" is the output.

Input  : racecar
Output : Equal
Explanation: In the string "racecar", the first character is 'r' 
and the last character is 'r', as they are equal, "Equal" is the output.

C++

// C++ program to check if the first
// and the last characters of a string
// are equal or not.
#include
 
using namespace std;
 
// Function to check if the first
// and the last haracters of a
// string are equal or not.
int areCornerEqual(string s)
    {
        int n = s.length();
        if (n < 2)
        return -1;
        if (s[0] == s[n - 1])
        return 1;
        else
        return 0;
    }
 
// Driver code
int main()
    {
        string s = "GfG";
        int res = areCornerEqual(s);
        if (res == -1)
            cout<<"Invalid Input";
        else if (res == 1)
            cout<<"Equal";
        else
            cout<<"Not Equal";
    }
     
// This code is contributed by
// Smitha Dinesh Semwal

Java

// Java program to check if the first and the last
// characters of a string are equal or not.
class GFG {
    public static int areCornerEqual(String s)
    {
        int n = s.length();
        if (n < 2)
           return -1;
        if (s.charAt(0) == s.charAt(n-1))
           return 1;
        else
           return 0;
    }
 
    // Driver code
    public static void main(String[] args)
    {
        String s = "GfG";
        int res = areCornerEqual(s);
        if (res == -1)
            System.out.println("Invalid Input");
        else if (res == 1)
            System.out.println("Equal");
        else
            System.out.println("Not Equal");
    }
}

Python3

# Python program to check
# if the first and the
# last characters of a
# string are equal or not.
 
st = "GfG"
if(st[0] == st[-1]):
 
    # print output
    # if condition
    # is satisfied
    print("Equal")
else:
 
    # print output
    # if condition is
    # not satisfied
    print("Not Equal")
 
# This code is contributed by
# shivi Aggarwal

C#

// Java program to check if the first and the last
// characters of a string are equal or not.
using System;
 
class GFG
{
     
    public static int areCornerEqual(String s)
    {
        int n = s.Length;
        if (n < 2)
            return -1;
        if (s[0] == s[n - 1])
            return 1;
        else
            return 0;
    }
     
    // Driver code
    static public void Main ()
    {
        String s = "GfG";
        int res = areCornerEqual(s);
         
        if (res == -1)
            Console.WriteLine("Invalid Input");
        else if (res == 1)
            Console.WriteLine("Equal");
        else
            Console.WriteLine("Not Equal");
    }
}
 
// This code is contributed by Ajit.
.

PHP

Javascript

输出：

Equal