Strassen-Equation

#include<bits/stdc++.h>
using namespace std;

int main()
{
    int mat[2][2],mat1[2][2];
    map<char,int> mp;
    char c='a';
    cout<<"ENTER THE FIRST 2 x 2 MATRIX  A\n";

    for(int i=0;i<2;i++ )
        for(int j=0;j<2;j++)
            {cin>>mat[i][j];
            mp[c]=mat[i][j];
            c++;
            }

    cout<<"ENTER THE SECOND 2 x 2 MATRIX  B\n";

    for(int i=0;i<2;i++ )
    for(int j=0;j<2;j++)
    {  cin>>mat1[i][j];
        mp[c]=mat1[i][j];
        c++;
    }

    int p1,p2,p3,p4,p5,p6,p7;

    p1=mp['a']*(mp['f']-mp['h']);
    p2=(mp['a']+mp['b'])*mp['h'];
    p3=(mp['c']+mp['d'])*mp['e'];
    p4=mp['d']*(mp['g']-mp['e']);
    p5=(mp['a']+mp['d'])*(mp['e']+mp['h']);
    p6=(mp['b']-mp['d'])*(mp['g']+mp['h']);
    p7=(mp['a']-mp['c'])*(mp['e']+mp['f']);

    int resmat[2][2];

    resmat[0][0]=p5+p4-p2+p6;
    resmat[0][1]=p1+p2;
    resmat[1][0]=p3+p4;
    resmat[1][1]=p1+p5-p3-p7;

    cout<<"THE RESULTANT MATRIX   A X B   IS\n";

    for(int i=0;i<2;i++)
    {
        for(int j=0;j<2;j++)
        cout<<resmat[i][j]<<" ";
        cout<<endl;
    }

    return 0;

    }