Matrix Formula

heres my code:

Code:

cout<<"\n\n"<<"ENCODER"<<"\n\n";
            char a;
            char b;
            char c;
            char d;
            cout<<"Enter 4 letters to encode (CAPS):\n";
            cin>>a;
            cin.ignore();
            cin>>b;
            cin.ignore();
            cin>>c;
            cin.ignore();
            cin>>d;
            cin.ignore();
            //convert into numbers
            int A;
            int B;
            int C;
            int D;
            for(int i=65; i<(65+26); i++)
            {
                if(a==(char)i)
                {
                    A=(i-64);
                }
            }
            for(int j=65; j<(65+26); j++)
            {
                if(b==(char)j)
                {
                    B=(j-64);
                }
            }
            for(int k=65; k<(65+26); k++)
            {
                if(c==(char)k)
                {
                    C=(k-64);
                }
            }
            for(int l=65; l<(65+26); l++)
            {
                if(d==(char)l)
                {
                    D=(l-64);
                }
            }
            //end of conversion  
            //get Key Matrix
            int e;
            int f;
            int g;
            int h;
            cout<<"Enter Key Matrix:\n";
            cout<<"(r1c1)-";
            cin>>e;
            cin.ignore();
            cout<<"(r1c2)-";
            cin>>f;
            cin.ignore();
            cout<<"(r2c1)-";
            cin>>g;
            cin.ignore();
            cout<<"(r2c2)-";
            cin>>h;
            cin.ignore();
            //encode letter/numbers
            int Ea;
            int Eb;
            int Ec;
            int Ed;
            Ea=(e*A)+(g*B);
            Eb=(f*A)+(h*B);
            Ec=(e*C)+(g*D);
            Ed=(f*C)+(h*D);
            //end encoding
            //display inforamtion                
            cout<<"--- ENCODED Matrix Numbers ---\n\n";
            cout<<"[[  "<<Ea<<"  "<<Eb<<"\n";
            cout<<"    "<<Ec<<"  "<<Ed<<"  ]]\n\n";
            char EA;
            char EB;
            char EC;
            char ED;
            EA=(char)(Ea+64);
            EB=(char)(Eb+64);
            EC=(char)(Ec+64);
            ED=(char)(Ed+64);
            //end conversion
            cout<<"--- ENCODED Matrix Letters ---\n\n";
            cout<<EA<<EB<<EC<<ED;
            cout<<"\n\n";
            cin.ignore();
        }