TRANSPOSE OF A MATRIX using DYNAMIC MEMORY ALLOCATION

3. Write a CPP program to find transpose of 2D matrix and allocate memory dynamically to the matrix using dynamic memory allocation. Initialize and display contents of the matrix and deallocate memory.

 // TRANSPOSE OF A MATRIX using DYNAMIC MEMORY ALLOCATION

#include<iostream.h>

class trans

{

            int **a,**b;

            int m,n;

  public:

            void initialize();

            void transpose();

            void display();

            void deallocate();

};

void trans::initialize()

{

            int i,j;

            cout<<"No. of Rows and Columns: ";

            cin>>m>>n;

            a=new int *[m];   // create input matrix

            for(i=0; i<m; i++)

                        a[i]=new int[n];

            cout<<"Enter elements:\n";

            for(i=0; i<m; i++)

            for(j=0; j<n; j++)  cin>>a[i][j];

            b=new int *[n];  // create transpose matrix

            for(i=0; i<n; i++)

                        b[i]=new int[m];

}

void trans::transpose() 

{

            int i,j; 

            for(i=0; i<m; i++)

            for(j=0; j<n; j++)    // transpose is in 'b'

                        b[j][i]=a[i][j];

}

void trans::display() 

{

            int i,j;

            cout<<"Transpose:\n";

            for(i=0; i<n; i++)

            {

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

                                    cout<<b[i][j]<<" ";

                        cout<<"\n";

            }

}

void trans::deallocate() 

{

            int i;

            for(i=0; i<m; i++) delete a[i];

            delete a;

            for(i=0; i<n; i++) delete b[i];

            delete b;

}

int main() 

{

            trans t;

            t.initialize();

            t.transpose();

            t.display();

            t.deallocate();

}