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C++ program to check if first and the last characters of string are equal
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
#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
Updated on: 18-Oct-2019
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