C++ - Simple Dynamic 2D array example
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| #include <vector>
#include <iostream>
template <typename T>
class Dynamic2DArray
{
std::vector<std::vector<T>> m_data;
public:
Dynamic2DArray(int rowCount, int colCount)
{
m_data.resize(rowCount);
for (auto& item : m_data)
{
item.resize(colCount);
}
}
int RowCount() const
{
return (int)m_data.size();
}
int ColCount() const
{
if (m_data.size() > 0)
{
return (int)m_data[0].size();
}
return 0;
}
std::vector<T>& operator[](int rowIdx)
{
if (rowIdx >= 0 && rowIdx < (int)m_data.size())
return m_data[rowIdx];
throw std::runtime_error("out of index");
}
void RemoveLastRow()
{
if (m_data.empty() == false)
m_data.erase(m_data.end() - 1);
}
void RemoveLastColumn()
{
for (auto& item : m_data)
{
if (item.empty() == false)
item.erase(item.end() - 1);
}
}
void PrintData()
{
int colCount = ColCount();
for (int row = 0; row < (int)m_data.size(); ++row)
{
for (int col = 0; col < colCount; ++col)
{
std::cout << m_data[row][col] << " ";
}
std::cout << std::endl;
}
}
};
|