Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Check if a given string is made up of two alternating characters in C++
Here we will see how to check a string is made up of alternating characters or not. If a string is like XYXYXY, it is valid, if a string is like ABCD, that is invalid.
The approach is simple. We will check whether all ith character and i+2 th character are same or not. if they are not same, then return false, otherwise return true.
Example
#include <iostream>
using namespace std;
bool hasAlternateChars(string str){
for (int i = 0; i < str.length() - 2; i++) {
if (str[i] != str[i + 2]) {
return false;
}
}
if (str[0] == str[1])
return false;
return true;
}
int main() {
string str = "XYXYXYX";
if(hasAlternateChars(str)){
cout << "Valid String";
}else{
cout << "Not a Valid String";
}
}Output
Valid String
Updated on: 27-Sep-2019
327 Views
Advertisements