Check if First and Last Characters of String are Equal in C++

Given with an input of string and the task is to check whether the first and last characters of given string is equal or not.

Example

Input-: study
Output-: not equal
   As the starting character is ‘s’ and the end character of a string is ‘y’
Input-: nitin
Output-: yes it have first and last equal characters
   As the starting character is ‘n’ and the end character of a string is ‘n’

Approach used below is as follows −

• Input the string and store in an array of strings.
• Calculate the length of a string using length() function
• Check first and last element of a string array, if they are equal return 1 else retrun -1
• Print the resultant output

Algorithm

Start
Step 1-> declare function to check if first and last charcters are equal or not
   int check(string str)
   set int len = str.length()
      IF (len < 2)
         return -1
      End
      If (str[0] == str[len - 1])
         return 1
      End
      Else
         return 0
      End
Step 2->Int main()
   declare string str = "tutorialsPoint"
   set int temp = check(str)
   If (temp == -1)
      Print “enter valid input"
   End
   Else if (temp == 1)
      Print "yes it have first and last equal characters"
   End
   Else
      Print "Not equal”
Stop

Example

 Live Demo

#include<iostream>
using namespace std;
//function to check if first and last charcters are equal or not
int check(string str) {
   int len = str.length();
   if (len < 2)
      return -1;
   if (str[0] == str[len - 1])
      return 1;
   else
      return 0;
}
int main() {
   string str = "tutorialsPoint";
   int temp = check(str);
   if (temp == -1)
      cout<<"enter valid input";
   else if (temp == 1)
      cout<<"yes it have first and last equal characters";
   else
      cout<<"Not equal";
}

Output

IF WE RUN THE ABOVE CODE IT WILL GENERATE FOLLOWING OUTPUT

yes it have first and last equal characters