#include <iostream>
#include <sstream>
#include <string>
#define COLS 6
std::string convert_column_to_string(int matrix[][COLS], int rows, int col) {
std::string str = "";
std::ostringstream oss;
for (int i = 0; i < rows; i++) {
oss << matrix[i][col];
str += oss.str() + " ";
oss.str("");
oss.clear();
}
return str;
}
int main()
{
int matrix[][COLS] = {
{ 4, 7, 9, 18, 29, 0 },
{ 1, 9, 18, 99, 4, 3 },
{ 9, 17, 89, 2, 7, 5 },
{ 19, 49, 6, 1, 9, 8 },
{ 29, 4, 7, 9, 18, 6 } };
int col = 3;
int rows = sizeof(matrix) / sizeof(matrix[0]);
std::string str = convert_column_to_string(matrix, rows, col);
std::cout << str;
}
/*
run:
18 99 2 1 9
*/
