Sanket Akadkar

• Sep 2nd, 2011

 

#include
#include

class matrix{
private:
int mat[5][5];
int row;
int column;
public:
matrix(int,int);
matrix(matrix&);
void getdata();
matrix operator-(matrix);
matrix operator+(matrix);
matrix operator*(matrix);
void display();
};

matrix::matrix(int r,int c)
{
cout<<"constructor to initiliaze no of rows and columns"< row=r;column=c;
}

matrix::matrix(matrix& m)
{
row=m.row;
column=m.column;

cout<<"Copy constructor"< for(int i=0;i {
for(int j=0;j {
mat[i][j]=m.mat[i][j];
}
}
}

void matrix::getdata()
{
cout<<"Value input:"< for(int i=0;i {
for(int j=0;j {
cout<<"Value("< cin>>mat[i][j];
}
}


}

matrix matrix::operator+(matrix a)
{
cout<<"Addition operator"<
matrix temp(row,column);

for(int i=0;i {
for(int j=0;j {
temp.mat[i][j]=mat[i][j]+a.mat[i][j];
}
}
return temp;
}

matrix matrix::operator-(matrix a)
{
cout<<"Subtraction operator"<
matrix temp(row,column);

for(int i=0;i {
for(int j=0;j {
temp.mat[i][j]=mat[i][j]-a.mat[i][j];
}
}
return temp;
}

matrix matrix::operator*(matrix a)
{
cout<<"Multiplaction operator"<
matrix temp(row,column);

for (int i=0;i {
for (int j=0;j {
temp.mat[i][j]=0;
for(int k=0;k {
temp.mat[i][j]=temp.mat[i][j]+(mat[i][k]*a.mat[k][j]);
}
}
}

return temp;
}

void matrix::display()
{
cout<<"The matrix is "< for(int i=0;i {
for(int j=0;j {
cout< }
cout< }
}

int main()
{
clrscr();
matrix m1(2,2),m2(2,2),m3(2,2);

m1.getdata();
m2.getdata();

m3=m1+m2;
m3.display();

m3=m1-m2;
m3.display();

m3=m1*m2;
m3.display();

getch();
return 0;
}

binoy

• Aug 23rd, 2012

 

Code
#include<iostream.h>


#include<conio.h>


class matrix


{


  private:long m[5][5];


  int row;int col;


  public:void getdata();


  int operator ==(matrix);


  matrix operator+(matrix);


  matrix operator-(matrix);


  friend ostream & operator << (ostream &,matrix &);


};


/* function to check whether the order of matrix are same or not */


int matrix::operator==(matrix cm)


{


  if(row==cm.row && col==cm.col)


  {


    return 1;


  }


  return 0;


}


/* function to read data for matrix*/


void matrix::getdata()


{


  cout<<"enter the number of rows


";


  cin>>row;


  cout<<"enter the number of columns


";


  cin>>col;


  cout<<"enter the elements of the matrix


";


  for(int i=0;i<row;i++)


  {


    for(int j=0;j<col;j++)


    {


       cin>>m[i][j];


    }


  }


}


/* function to add two matrix */


matrix matrix::operator+(matrix am)


{


  matrix temp;


  for(int i=0;i<row;i++)


  {


    for(int j=0;j<col;j++)


    {


      temp.m[i][j]=m[i][j]+am.m[i][j];


    }


    temp.row=row;


    temp.col=col;


  }


  return temp;


}


/* function to subtract two matrix */


matrix matrix::operator-(matrix sm)


{


  matrix temp;


  for(int i=0;i<row;i++)


  {


    for(int j=0;j<col;j++)


    {


      temp.m[i][j]=m[i][j]-sm.m[i][j];


    }


    temp.row=row;


    temp.col=col;


  }


  return temp;


}


/* function to display the contents of the matrix */


ostream & operator <<(ostream &fout,matrix &d)


{


  for(int i=0;i<d.col;i++)


  {


    for(int j=0;j<d.col;j++)


    {


      fout<<d.m[i][j];


      cout<<" ";


    }


    cout<<endl;


  }


return fout;


}


/* main function */


void main()


{


  matrix m1,m2,m3,m4;


  clrscr();


  m1.getdata();


  m2.getdata();


  if(m1==m2)


  {


    m3=m1+m2;


    m4=m1-m2;


    cout<<"Addition of matrices


";


    cout<<"the result is


";


    cout<<m3;


    cout<<"subtraction of matrices


";


    cout<<"The result is 


";


    cout<<m4;


  }


  else


  {


    cout<<"order of the input matrices is not identical


";


  }


  getch();


}

JoolsL

• Nov 19th, 2012

 

In both the above answers the op overloads should be using a const ref as input. You should have a (private) ctor that makes the matrix from the data, and should use RVO in the return.