Matrix operations using overloaded operators in C++

 

#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<<"\n Enter the order of first matrix:";
cin>>m1>>n1;
cout<<"\n Enter 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<<"\n Enter the elements of first matrix:";
cin>>a;
cout<<"\n Enter the elements of second matrix:";
cin>>b;
c=a+b;
cout<<"\n The first matrix A:\n";
cout<<a;
cout<<"\n The second matrix B:\n";
cout<<b;
cout<<"\n The resultant matrix after addition is:\n";
cout<<c;
m=a-b;
cout<<"\n The resultant matrix after subtraction is:\n";
cout<<m;
n=a*b;
cout<<"\n The resultant matrix after multiplication is:\n";
cout<<n;
}
else
cout<<"\n Matrix operation is not possible";
getch();
}

/*---------------INPUT/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 matrix :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

*/