metrix

[shirshir950]

hello , i need some help with this code .
im trying to program a metrix of 5x5, that get from the user a letter, than the
program export the column index which the letter shows in the most.
if the letter has not shown at all then the program export a message about it.
i cant go through the metrix in the begining to check it.

  #include <iostream>

using namespace std;

const int ROWS = 5;
const int COLS = 5;

void main()
{
	char chars[ROWS][COLS] = { {'a','b', 'c', 'd', 'e'}, {'d','e','f','g','k'}, {'s','h','m','s','h'},
	{ 's','f','g','k','e'}, {'s','t','s','t','n'} };

	char orig;
	char freqLetter;
	char letter;
	int i, j, max=0;

	cout << "Please enter a letter " << endl;
	{
		cin >> letter;
	}

	cout << "chars" << endl;
	for (int i = 0; i < ROWS; i++)
	{
		cout << "MATRIX" << ": " << i + 1 << endl;
		for (int j = 0; j < COLS; j++)
			cout << chars[i][j] << " ";
		cout << "\n";
	}
	
	for (i = 0; i < COLS; i++)
	{
		for ( freqLetter = 0,j = 0; j < ROWS ; j++)
		{
			orig = chars[j][i];
			if (letter == orig)
			{
				cout << orig << endl;
				cout << j+1 << "  " << i+1 << endl;
			
			}
			
		}
		
		
	}
	
		

	system("pause");
}

[lastchance]

Should be
int main()
not
void main()

Apart from that it's fine. The following is the output in C++ shell:

Please enter a letter 
s
chars
MATRIX: 1
a b c d e 
MATRIX: 2
d e f g k 
MATRIX: 3
s h m s h 
MATRIX: 4
s f g k e 
MATRIX: 5
s t s t n 
s
3  1
s
4  1
s
5  1
s
5  3
s
3  4

Not sure what you mean by

i cant go through the metrix in the begining to check it.

What is the problem? At present it displays all positions that this letter is in.

[shirshir950]

the problem is that i need to program in which columns the letter shows the most .
if the letter has not shown at all than also print a message that says that.

[lastchance]

When
letter == orig
you can increase frequency by 1.

If you also keep a tally of max_frequency (initially 0) and max_col (initially anything) then when frequency for that column exceeds max_frequency you can update them.

At the end ...
- if max_frequency is still 0 then print out that this letter wasn't found
- otherwise you can print out max_col

Over to you to code.

[shirshir950]

#include <iostream>

using namespace std;

const int ROWS = 5;
const int COLS = 5;

void main()
{
char chars[ROWS][COLS] = { {'a','b', 'c', 'd', 'e'}, {'d','e','f','g','k'}, {'s','h','m','s','h'},
{ 's','f','g','k','e'}, {'s','t','s','t','n'} };

char orig;
char letter;
int i, j,freqLetter ;


cout << "Please enter a letter " << endl;
{
cin >> letter;
}

cout << "chars" << endl;
for (int i = 0; i < ROWS; i++)
{
cout << "MATRIX" << ": " << i + 1 << endl;
for (int j = 0; j < COLS; j++)
cout << chars[i][j] << " ";
cout << endl;
}

int max = 0;
for (i = 0; i < COLS; i++)
{

for (freqLetter = 0, j = 0; j < ROWS ; j++)
{
orig = chars[j][i];
if (letter == orig)
{
cout << orig << endl;
cout << j+1 << " " << i+1 << endl;
freqLetter++;
}

}
if (freqLetter > max)
{
max =i+1;
}


}
cout << endl;
cout << max << endl;


system("pause");
}

work