Using C++ implement class with dynamic memory allocation using constructor,destructor and copy constructor.Algorithm

Implement class with dynamic memory allocation.

Aim

     To implement class with dynamic memory allocation using constructor,destructor and copy constructor.Algorithm

Algorithm

Step 1: Start the Program Execution

Step 2: Create the Classes and declare all the Variables and Member functions.

Step 3: Using the classes with dynamic memory alloction.

Step 4: Create the class name as MATRIX.

Step 5: Declare the data member and member function.

Step 6: Declare constructor,destructor and copy constructor

Step 7: Display the result.

Step 8: Stop the Program Execution.

Program:

#include<iostream.h>

#include<conio.h>

class matrix

{

int **m;

int row,col;

public:

matrix()

{

row=col=0;

m=NULL;

}

matrix(int r,int c);

~matrix();

void getmatrix();

void showmatrix();

matrix(matrix &m2);

matrix &operator=(matrix &m2);

};

matrix::~matrix()

{

for(int i=0;i<row;i++)

delete m[i];

delete m;

}

matrix::matrix(int r,int c)

{

row=r;

col=c;

m=new int *[row];

for(int i=0;i<row;i++)

m[i]=new int[col];

}

matrix::matrix(matrix &m2)

{

cout<<"\n  Copy constructor invoked....\n";

row=m2.row;

col=m2.col;

m=new int*[row];

for(int i=0;i<row;i++)

m[i]=new int[col];

for(i=0;i<row;i++)

for(int j=0;j<row;j++)

m[i][j]=m2.m[i][j];

}

matrix &matrix::operator=(matrix &m2)

{

cout<<"\n Assignment operator overloading....\n" ;

row=m2.row;

col=m2.col;

m=new int*[row];

for(int i=0;i<row;i++)

m[i]=new int[col];

for(i=0;i<row;i++)

for(int j=0;j<row;j++)

m[i][j]=m2.m[i][j];

return *this;

}

void matrix::getmatrix()

{

int i,j;

for(i=0;i<row;i++)

for(j=0;j<col;j++)

cin>>m[i][j];

}

void matrix::showmatrix()

{

for(int i=0;i<row;i++)

{

for(int j=0;j<col;j++)

cout<<"\t"<<m[i][j];

cout<<"\n";

}

}

void main()

{

int r,c;

clrscr();

cout<<"\nEnter the no of rows and columns.....\n";

cin>>r>>c;

matrix m1(r,c);

cout<<"Enter the matrix elements....\n";

m1.getmatrix();

cout<<"\nThe entered mjatrix is..............\n";

m1.showmatrix();

matrix m2=m1;

cout<<"\nThe resultant matrix is....\n";

m2.showmatrix();

matrix m3;

m3=m1;

cout<<"\nResult of assignment operator overloading.....\n";

m3.showmatrix();

getch();

}

Posted in: C / C++ Program