'C++' PROGRAM TO IMPLEMENT MATRIX OPERATIONS USING OVERLOADED OPERATORS. (<<,>>,+,-,*)

/*A 'C++' PROGRAM TO IMPLEMENT MATRIX OPERATIONS USING OVERLOADED OPERATORS.
  (<<,>>,+,-,*)
  THE OPERATIONS SUPPORTED BY THIS ADT ARE:
      a)READING OF A MATRIX     b)PRINTING OF A MATRIX
      c)ADDITION OF MATRICES    d)SUBTRACTION OF MATRICES
      e)MULTIPLICATION OF MATRICES

NAME         :G.SanjeevaReddy
ROLLNO         :09121F0026
BRANCH       :M.C.A,II SEM A-SEC */

#include<iostream.h>
#include<conio.h>
#include<stdlib.h>
int m1,n1,m2,n2;
class matrix
{
    int a[10][10],m,n;
    public:
    matrix(int a,int b)
    {
        m=a;
        n=b;
    }
    friend istream & operator >>(istream &get,matrix &m);
    friend ostream & operator <<(ostream &put,matrix &m);
    matrix operator +(matrix);
    matrix operator -(matrix);
    matrix operator *(matrix);
};

istream & operator >>(istream &get,matrix &x)
{

    for(int i=0;i<x.m;i++)
        for(int j=0;j<x.n;j++)
            get>>x.a[i][j];
    return get;
}

ostream & operator <<(ostream &put,matrix &x)
{
    for(int i=0;i<x.m;i++)
    {
        for(int j=0;j<x.n;j++)
            put<<x.a[i][j]<<"\t";
        put<<endl;
    }

    return put;
}

matrix matrix:: operator +(matrix x)
{
    matrix c(m1,n1);
    for(int i=0;i<m;i++)
        for(int j=0;j<n;j++)
               c.a[i][j]=a[i][j]+x.a[i][j];
    return c;

}

matrix matrix:: operator -(matrix x)
{
    matrix c(m1,n1);
    c.m=m;
    c.n=n;
    for(int i=0;i<m;i++)
        for(int j=0;j<n;j++)
            c.a[i][j]=a[i][j]-x.a[i][j];
    return c;
}

matrix matrix:: operator *(matrix x)
{
    matrix c(m1,n2);
    for(int i=0;i<m1;i++)
        for(int j=0;j<n2;j++)
        {
            c.a[i][j]=0;
            for(int k=0;k<n1;k++)
                c.a[i][j]+=(a[i][k]*x.a[k][j]);
        }
        return c;
}

void main()
{
    clrscr();
    cout<<"\nEnter the order of first matrix :";
    cin>>m1>>n1;
    cout<<"\nEnter the order of second matrix :";
    cin>>m2>>n2;
    matrix a(m1,n1),b(m2,n2),c(m1,n1),m(m1,n1),n(m1,n2);
    if(m1==n2)
    {
        cout<<"\nEnter the elements of first matrix :";
        cin>>a;
        cout<<"\nEnter the elements of second matix :";
        cin>>b;
        c=a+b;
        cout<<"\nThe first matrix A :\n";
        cout<<a;
        cout<<"\nThe second matrix B :\n";
        cout<<b;
        cout<<"\nThe resultant matrix after addition is :\n";
        cout<<c;
        m=a-b;
        cout<<"\nThe resultant matrix after subtraction is :\n";
        cout<<m;
        n=a*b;
        cout<<"\nThe resultant matrix after multiplication is :\n";
        cout<<n;
    }
    else
        cout<<"\nMatrix operation is not possible";
    getch();
}

/*         OUTPUT
        ------

Enter the order of first matrix :2
2

Enter the order of second matrix :2
2

Enter the elements of first matrix :1
2
3
4

Enter the elements of second matix :1
0
0
1

The first matrix A :
1       2
3       4

The second matrix B :
1       0
0       1

The resultant matrix after addition is :
2       2
3       5

The resultant matrix after subtraction is :
0       2
3       3

The resultant matrix after multiplication is :
1       2
3       4

*/