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 large number is divisible by 20 in C++
Here we will see how to check a number is divisible by 20 or not. In this case the number is very large number. So we put the number as string.
A number will be divisible by 20, when that is divisible by 10, and after dividing 10, the remaining number is divisible by 2. So the case is simple. If the last digit is 0, then it is divisible by 10, and when it is divisible by 10, then the second last element is divisible by 2, the number is divisible by 20.
Example
#include <bits/stdc++.h>
using namespace std;
bool isDiv20(string num){
int n = num.length();
if(num[n - 1] != '0')
return false;
int second_last = num[n - 2] - '0';
if(second_last % 2 == 0)
return true;
return false;
}
int main() {
string num = "54871584540";
if(isDiv20(num)){
cout << "Divisible";
}else{
cout << "Not Divisible";
}
}Output
Divisible
Updated on: 27-Sep-2019
139 Views
Advertisements