Trying to print all the adjacent duplicates of an input

[daft science]

I want all adjacent duplicates. Like, if the input is 1 3 3 4 5 5 6 6 2, the program should print 3 5 6. I've tried moving stuff around but I can't get the output I want. Not sure if I'm missing something or my logic is wrong. Thanks in advance. :)

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
double input;
double previous;
cout << "Please enter a series of numbers : ";
cin >> previous;
while (cin >> input)
{
if (input == previous)
{
input ++;
}
cout << "The duplicate inputs are: "<< input << endl;
previous = input;
}

}

[Yanson]

Read this please
http://www.cplusplus.com/articles/z13hAqkS/


something like this

#include <iostream>
using namespace std;


int main()
{

	int i = 0;
	int arr[100];
	int size;

	cout << "How many numbers would you like to enter ";
	cin >> size;
	cin.ignore();

	for (i = 0; i < size; i++)
	{
		cout << "Enter a number ";
		cin >> arr[i];
		cin.ignore();
		cout << endl;
	}
	

	for (i = 0; i < size - 1; i++)
	{
		if (arr[i] == arr[i + 1])
			cout << "Duplicate number " << arr[i] << endl;
	}
	cin.ignore();
	return 0;
}

[daft science]

That works, thanks. :)

Is there a way to do this without an array though? I'm trying to stay in context of my class' subject material. Is my logic just completely off?

[28poGNh0]

You dont get the same result of duplicates if you enter 12123434

[daft science]

You mean the duplicates have to be adjacent? Yea, I know that much. Part of my assignment is that they have to be adjacent.

[28poGNh0]

Ahhh adjacent
I did not pay more attention to that
apologies

[daft science]

No big :)

[Yanson]

#include <iostream>
#include <cmath>
using namespace std;
int main() 
{
	double input = 0;
	double previous;
	cout << "Please enter a series of numbers ending with -1: "; 
	cin >> previous;
	cin.ignore();

	cout << "The duplicates are ";
	while (input != -1)
	{		
		cin >> input;
		cin.ignore();
		if (input == previous) 
		{ 
			cout << input << ",";
		}
		previous = input;
		
	}
	cin.ignore();
	return 0;
}