How to Match Values Within an Array

[paulmcco]

Hello,

I am trying to take an array of a given size (5), and write a function that will select matching values within that array...

...for example...if I have an array of the following integers, I would like the function to output the matching values...

array[5] = {3, 4, 4, 4, 5}

The Output should show that there are three matching values (4, 4, & 4)...

I've been playing with code from previous articles to no avail...here is what I have so far:

int numbs[5],  value, idx, n = 5;
        
        cout << "Please enter in a series of numbers "<<endl;
        for(idx = 0; idx < n; idx++)
			cin >> numbs[idx];
		
		        
        for (int i = 0; i < n; i++)
        {
			bool matching = false;
			for (int j = 0; (j < i) && (matching == false); j++)
		
			if (numbs[i] == numbs[j]) matching = true;
			if (matching) cout<< numbs[i] << " ";
        }    

Please Advise...thanks!

[buffbill]

It seems that one way would be to use two loops and a separate
counter.
The first loop say (i) would iterate through the array first pointing at array[0], and the second loop say (j) would compare the second, third,fourth (and so on) elements with the first element. J would appear to always = i+1 at the start of its iteration. Then after the first iteration i would point to the array [1] element and j would point to array[2]. this element and all succeeding elements would be compared with array[1]. and so on. If the element being traversed by j was == the element pointed to by i then the i counter could be increased by one. After each iteration print out the number of duplicates and zero the counter.
hope this helps.

[Mathhead200]

Do you know how to search an array (linear search?)
Just do that, and each time you find the value you want, do what you want with it...

[paulmcco]

Thanks for the help...my problem was mostly syntax within the "for-loops"...

Here is the solution...

int numbs[5], idx, n = 5;
        
        cout << "Please enter in a series of numbers "<<endl;
        for(idx = 0; idx < n; idx++)
			cin >> numbs[idx];
		
		    int j=1;    
        for (int i = 0; (i < n - 1); i++)
        {
			
			bool matching = false;
			for (j = i + 1; (j < n) && (matching == false); j++)
			{
		
				if (numbs[i] == numbs[j]) {matching = true;}
				if (matching) 
					{
						cout<< numbs[i] << ", " << numbs[j];
						cout << "\nj is equal to: " << j << "\n";
						matching = false;
				
					}
			}
			
				cout << "Iteration of i: " << i << "\n";
        }  

[Keith]

Hi,
got some question on my c++ project.
how can i validate or match the data that store in my array with a user input from a keyboard?
thx