Multiply Matrices by Strassen's Method

C++ Program to multiply matrix using Strassen's Multiplication method. This program calculates the multiplication of 2 matrices by Strassen's Multiplication method. We define a 3 arrays : 'a' , 'b' & 'c' , all of int type. All 3 are input by the user. The number of rows & columns are made fix to 2. Then the multiplication is calculated by using strassen's method and the new multiplied matrix is printed on the screen.
Source Code:-

#include<iostream.h>
#include<conio.h>
void main()
{int a[2][2],b[2][2],c[2][2];
 int m1,m2,m3,m4,m5,m6,m7,i,j;
 clrscr();
 cout<<"Matrix Multiplication Strassrn's method by-Tarun Rawat\n";
 cout<<"Enter the elements of 2x2 Matrix 1:\n";
 for(i=0;i<2;i++)
 {
  for(j=0;j<2;j++)
  {
   cin>>a[i][j];
  }
 }
 cout<<"Enter the elements of 2x2 Matrix 2:\n";
 for(i=0;i<2;i++)
 {
  for(j=0;j<2;j++)
  {
   cin>>b[i][j];
  }
 }
 clrscr();
 cout<<"\nFirst matrix is:\n";
 for(i=0;i<2;i++)
 {
  for(j=0;j<2;j++)
  {
   cout<<a[i][j];
  }
  cout<<"\n";
 }
 cout<<"\nSecond matrix is\n";
 for(i=0;i<2;i++)
 {
  for(j=0;j<2;j++)
  {
   cout<<b[i][j];
  }
  cout<<"\n";
 }
 m1= (a[0][0] + a[1][1])*(b[0][0]+b[1][1]);
 m2= (a[1][0]+a[1][1])*b[0][0];
 m3= a[0][0]*(b[0][1]-b[1][1]);
 m4= a[1][1]*(b[1][0]-b[0][0]);
 m5= (a[0][0]+a[0][1])*b[1][1];
 m6= (a[1][0]-a[0][0])*(b[0][0]+b[0][1]);
 m7= (a[0][1]-a[1][1])*(b[1][0]+b[1][1]);
 c[0][0]=m1+m4-m5+m7;
 c[0][1]=m3+m5;
 c[1][0]=m2+m4;
 c[1][1]=m1-m2+m3+m6;
 cout<<"\nProduct of both is:\n";
 for(i=0;i<2;i++)
 {
  for(j=0;j<2;j++)
  {
   cout<<c[i][j];
  }
  cout<<"\n";
 }
 getch();
}