Array. How to find the location of a searched number?

[piratekingluffy]

I have to modify my countNums where after it searches for the number, it lists the row and column that it is included in.

I do not know how to start it.

Thanks for the help.

 #include <iostream>

using namespace std;

void fillArray(int a[][5], int size);
void printArray(int a[][5], int size);
int countNums(int ar[][5], int size, int search);

int main()
{
	int ar[5][5];

	fillArray(ar, 5);
	printArray(ar, 5);

	cout << "What number do you want to search for? " << endl;
	int num;
	cin >> num;
	int count = countNums(ar, 10, num);
	cout << "Your number appears " << count << " times in the array " << endl;

	return 0;
}

void fillArray(int a[][5], int size)
{
	for (int row = 0; row < 5; row++)
	{
		for (int col = 0; col < 5; col++)
		{
			a[row][col] = rand() % 10 + 1;
		}
	}
}

void printArray(int a[][5], int size)
{
	for (int row = 0; row < 5; row++)
	{
		for (int col = 0; col < 5; col++)
		{
			cout << a[row][col] << "\t";
		}
		cout << endl;
	}
}

int countNums(int ar[][5], int size, int search)
{
	int count = 0;
	for (int row = 0; row < 5; row++)
	{
		for (int col = 0; col < 5; col++)
		{
			if (ar[row][col] == search)
				count++;
		}
	}
	return count;
}

[Handy Andy]

Hello piratekingluffy,

The quick solution would be to change the if statement at line 55 and add a cout to print "row" and "col".

You may also need something at the end of main to keep the window open to see what you have printed out.

http://www.cplusplus.com/forum/beginner/1988/

And BTW what is "size" used for in the "countNums" function? And why does it need t be there?

Hope that helps,

Andy

[Thomas1965]

Why do you pass the parameter size to your functions if you don't use them?
Same in your last thread.

[piratekingluffy]

@Thomas1965, that was how my instructor showed it to us.

@Handy Andy, so I should just change to if statement on line 55 to a cout print?

[Thomas1965]

To print the location of the found number just change

  if (ar[row][col] == search)
    count++;

to

  if (ar[row][col] == search)
  { 
    count++;
    cout << "found " << search << " at " << "row " << row << " col " << col << "\n";
  }

[piratekingluffy]

Thanks Thomas. It was such a simple solution. Thank you.