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dynamic_matrix.cpp
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dynamic_matrix.cpp
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#include <iostream>
using namespace std;
class DynamicMatrix {
private:
int rows;
int cols;
int **matrix; // Pointer to a 2D array
public:
// Constructor to initialize the matrix with specified dimensions
DynamicMatrix(int numRows, int numCols) : rows(numRows), cols(numCols) {
// Allocate memory for the matrix
matrix = new int*[rows];
for (int i = 0; i < rows; ++i) {
matrix[i] = new int[cols];
}
}
// Destructor to free dynamically allocated memory
~DynamicMatrix() {
// Deallocate memory for the matrix
for (int i = 0; i < rows; ++i) {
delete[] matrix[i];
}
delete[] matrix;
}
// Function to set the value at a specific position in the matrix
void setValue(int row, int col, int value) {
if (row >= 0 && row < rows && col >= 0 && col < cols) {
matrix[row][col] = value;
} else {
cout << "Invalid matrix indices." << endl;
}
}
// Function to get the value at a specific position in the matrix
int getValue(int row, int col) const {
if (row >= 0 && row < rows && col >= 0 && col < cols) {
return matrix[row][col];
} else {
cout << "Invalid matrix indices." << endl;
return 0; // Return a default value (can be adjusted based on use case)
}
}
// Function to display the matrix
void display() const {
for (int i = 0; i < rows; ++i) {
for (int j = 0; j < cols; ++j) {
cout << matrix[i][j] << " ";
}
cout << endl;
}
}
};
int main() {
// Create a dynamic matrix with 3 rows and 4 columns
DynamicMatrix mat(3, 4);
// Set values in the matrix
for (int i = 0; i < 3; ++i) {
for (int j = 0; j < 4; ++j) {
mat.setValue(i, j, (i * 4) + j + 1);
}
}
// Display the matrix
cout << "Matrix:" << endl;
mat.display();
// Get and display a specific value from the matrix
int row = 1;
int col = 2;
cout << "Value at position (" << row << ", " << col << "): " << mat.getValue(row, col) << endl;
return 0;
}