CODEWITHSUNDEEP
c++arraysmultidimensional-array
Blueshift
Blueshift

Reputation: 160

Summing rows of 2D array of characters

I'm writing a program that reads data from a file that looks like:

W Z W Y W Y W W Y W Y Z W Z Y
Z W W W Y W Y W Z Y W Z W Y Y  
Z W Z Z Y Z Z W W W Y Y Y Z W
Z W Z Z Y Z Z W W W Y Y Y Z W 
Z W Z Z Y Z Z W W W Y Y Y Z W

I'm storing these characters in a 2D array, and I need to get the total amount of Ws, Zs, and Ys on each line but my code is printing out the total for each letter across the entire file, instead of the total on each line:

#include <iostream>
#include <fstream>

using namespace std;

int main() 
{
    ifstream in;
    in.open("file.txt");

    const int A_ROWS = 5, A_COLUMNS = 15;

    char items[A_ROWS][A_COLUMNS];

    // load 2D array with contents from file.
    for (int rows = 0; rows < A_ROWS; rows++)
    {
        for (int columns = 0; columns < A_COLUMNS; columns++)
        {    
            in >> items[rows][columns];
        }
    }

    //set counter for one letter
    int W = 0;
    for (int rows = 0; rows < A_ROWS; rows++)
    {
        for (int columns = 0; columns < A_COLUMNS; columns++)
        {    
            if (items[rows][columns] == 'W')
            {
                W++;
            }
        }
    }

    cout << W; // this prints out the TOTAL amount of Ws in the entire file

    in.close();
    return 0;
}

How can I get the total of each letter per line? Thanks all.

Upvotes: 0

Views: 48

Answers (2)

Yeldar Kurmangaliyev
Yeldar Kurmangaliyev

Reputation: 34199

So, you can simply move your W output and reset to the outer loop:

//set counter for one letter
int W;
for (int rows = 0; rows < A_ROWS; rows++)
{
    W = 0;

    for (int columns = 0; columns < A_COLUMNS; columns++)
    {    
        if (items[rows][columns] == 'W')
        {
            W++;
        }
    }

    cout << "Row " << rows << ": " << W << endl;
}

Upvotes: 1

R Sahu
R Sahu

Reputation: 206607

How can I get the total of each letter per line? Thanks all.

Create three arrays to keep track of the counts of the letters in each line.

int wCounts[A_ROWS] = {0};
int yCounts[A_ROWS] = {0};
int zCounts[A_ROWS] = {0};

Keep the count of the letters in the arrays instead of in single variables.

For W, it will be:

if (items[rows][columns] == 'W')
{
    wCounts[rows]++;
}

Upvotes: 1

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