Answer to Question #286707 in C++ for Rox

Question

Write a program to read the elements of a sparse matrix from the user and display 

it in its 3-tuple form. Your program should verify whether at the entire matrix 

is sparse or not.

Answer 1

#include <iostream>
using namespace std;


int main()
{
    int barMatrix[4][5] =
    {
        {0 , 0 , 2 , 0 , 4 },
        {7 , 0 , 5 , 7 , 0 },
        {0 , 0 , 0 , 0 , 0 },
        {0 , 4 , 6 , 0 , 0 }
    };


    int size = 0;
    for (int i = 0; i < 4; i++)
        for (int j = 0; j < 5; j++)
            if (barMatrix[i][j] != 0)
                size++;


    int fooMatrix[3][size];


    int k = 0;
    for (int i = 0; i < 4; i++)
        for (int j = 0; j < 5; j++)
            if (barMatrix[i][j] != 0)
            {
                fooMatrix[0][k] = i;
                fooMatrix[1][k] = j;
                fooMatrix[2][k] = barMatrix[i][j];
                k++;
            }


    for (int i=0; i<3; i++)
    {
        for (int j=0; j<size; j++)
            cout <<" "<< fooMatrix[i][j];


        cout <<"\n";
    }
    return 0;
}