Matching numbers in two arrays

[boxsta]

I'm working on some Uni tasks and I've made it 2 thirds of the way through the following but am stuck on the final part.

•Asks the user to enter 5 different numbers (between 1 and 20) and stores them in an array
•Asks the reader to enter another 5 numbers (between 1 and 20) into a second array
///////This is the one I'm stuck on , I've tried lots of different ways nut none seem to want to play ball!!
•Display both arrays on the screen as well as a list of the numbers that appear in both arrays (see example input and output below)

#include <iostream>
#include <Windows.h>

using namespace std;

int main()

const int NUM1 = 5;
const int NUM2 = 5;
int numbers1[NUM1];
int numbers2[NUM2];
int sum = 0;
int count = 0;


for (int firstArray = 0; firstArray < NUM1; firstArray++)
{
	cout << (firstArray + 1) << ". " << "Enter a number between 1 and 20 ";
	cin >> numbers1[firstArray];

	while ((numbers1[firstArray] < 0) || (numbers1[firstArray] >20))
	{
		cout << "Please enter a number between 1 and 20 you IDIOT! ";
		cin >> numbers1[firstArray];

	}

}
for (int secondArray = 0; secondArray < NUM2; secondArray++)
{
	cout << (secondArray + 1) << ". " << "Enter a number between 1 and 20 ";
	cin >> numbers2[secondArray];

	while ((numbers2[secondArray] < 0) || (numbers2[secondArray] >20))
	{
		cout << "Please enter a number between 1 and 20 you IDIOT! ";
		cin >> numbers2[secondArray];

	}
	
}

cout << "The numbers entered by you in the first array were:" ;

for (int i = 0; i < NUM1; i++)
{
	cout << numbers1[i]<< ", ";
}

cout << "\n\nThe numbers entered by you in the second array were:";

for (int j = 0; j < NUM2; j++)
{
	cout << numbers2[j]<< ", ";
}

	system("pause");
	return 0;
}

Thought would be hugely appreciated. I'm sure the solution is simple I just cant see the light through the trees right now :(

[xismn]

This is the one I'm stuck on , I've tried lots of different ways nut none seem to want to play ball!!

Why don't you show us what you've tried and maybe we can help you from there?

[48T7M4Gy]

1. Enter a number between 1 and 20 2
2. Enter a number between 1 and 20 3
3. Enter a number between 1 and 20 4
4. Enter a number between 1 and 20 5
5. Enter a number between 1 and 20 6
1. Enter a number between 1 and 20 7
2. Enter a number between 1 and 20 8
3. Enter a number between 1 and 20 9
4. Enter a number between 1 and 20 3
5. Enter a number between 1 and 20 5
The numbers entered by you in the first array were:2, 3, 4, 5, 6, 

The numbers entered by you in the second array were:7, 8, 9, 3, 5, 

All I can see is you missed an opening brace after line 6

[boxsta]

Display both arrays on the screen as well as a list of the numbers that appear in both arrays

I'm not sure I even know where to start with this in one tbh. I've just tried various random attempts.

[48T7M4Gy]

I'm not sure I even know where to start with this in one tbh.

Well, you should start with some pseudocode, and here is a start at that:

- take first number from the first array
- does it appear in the second array?
- if it does then display it

- blah blah

You're really wasting your time if you don't have a plan before coding. :)

[boxsta]

I understand the question but I don't know how to write the code. It's not really a lack of planning. More a case of purely and simply having hit a brick wall tbh. It's very rare that I ask for help, I feel a lot more satisfaction knowing I figured it out without having to ask but this time I really am stuck and I find arrays confusing at the best of times in any case.

Thanks for the advice though :)

What you said makes sense >> Does the number in the first slot of the first array match any of the numbers in array 2 memory slots? If so, remember those numbers so that I can output them when we have looped through all 5 numbers in the first array.

See I can say it, but I cant figure out how to code it.

[boxsta]

int count1 = 0;
int count2 = 0;
int k = 0;
int l = 0;

......
......

for (; k < 6; k++)
{
	for (; l < 6; l++)

	if (numbers1[1,2,3,4,5] == numbers2[1,2,3,4,5])

	{
		count1++;
		count2++;
	}
}

I sort of knew this want going to work but it was one of my attempts.

[48T7M4Gy]

#include <iostream>

using std::cout;
using std::endl;

int main()
{
	int limit = 5;
	
	int array1[] = { 1,2,3,6,5 };
	int array2[] = { 4,1,2,5,8 };

	for (int i = 0; i < limit; i++)
	{
		for (int j = 0; j < limit; j++)
		{
			if (array2[j] == array1[i])
				cout << array2[j] << endl;
		}
	}
return 0;
}

1
2
5
 
Exit code: 0 (normal program termination)

[boxsta]

cout << "\n\nThe matching numbers were ";

for (int i = 0; i < limit; i++)
{
	for (int j = 0; j < limit; j++)
	{
		if (numbers1[j] == numbers2[i])
			cout << numbers2[j] << ", ";
	}
}
cout << "\n\n";

kemort got it! Thank you so much :)

[48T7M4Gy]

:)