How t print a table in tabular form in two dimensional array in c plus plus?

Answer 1

#include<iostream>

#include<iomanip>

#include<vector>

#include<random>

#include<ctime>

using data_t = std::vector<std::vector<int>>;

size_t get_width (int num)

{

size_t width=1;

while (num/=10)

++width;

return width;

}

std::vector<size_t> get_column_widths (const data_t& data)

{

std::vector<size_t> width;

for (auto row : data)

{

if (width.size() < row.size())

width.resize (row.size());

for (size_t i=0; i<row.size(); ++i)

{

size_t w = get_width (row[i]);

if (width[i]<w)

width[i]=w;

}

}

return width;

}

void print_table (const data_t& data)

{

using std::cout;

using std::endl;

using std::right;

using std::setw;

std::vector<size_t> width = get_column_widths (data);

cout << right;

for (auto row : data)

{

for (size_t i=0; i<row.size(); ++i)

{

cout << setw(width[i]) << row[i] << ' ';

}

cout << endl;

}

}

int main()

{

// Random number generator (range: [1:1000])

std::default_random_engine generator ((unsigned) time (0));

std::uniform_int_distribution<unsigned> distribution (1, 10000);

// Create a 10x5 matrix:

data_t data;

for (size_t row=0; row<10; ++row)

{

data.push_back (std::vector<int>{});

for (size_t col=0; col<5; ++col)

data[row].push_back (distribution (generator));

}

print_table (data);

}

Answer 2

PrintMatrix (int *a, int rows, int columns) {

int i, j;

for (i=0; i<rows; ++i) {

for (j=0; j<columns; ++j) {

cout << a[i*rows+j] << "\t";

}

cout << endl;

}

}