calculo de determinante

//calculo de determinante

#include <iostream> 

using namespace std;

int main()

{

double a00,a01,a02,a10,a11,a12,a20,a21,a22,total;

cout<<"Ingrese los valores:"<<endl;

cout<<"|a00 a01 a02|" <<endl;

cout<<"|a10 a11 a12|" <<endl;

cout<<"|a20 a21 a22|" <<endl;

cout<<"a00: ";

cin>>a00;

cout<<"a01: ";

cin>>a01;

cout<<"a02: ";

cin>>a02;

cout<<"a10: ";

cin>>a10;

cout<<"a11: ";

cin>>a11;

cout<<"a12: ";

cin>>a12;

cout<<"a20: ";

cin>>a20;

cout<<"a21: ";

cin>>a21;

cout<<"a22: ";

cin>>a22;

/*

               !a00 a10 a20! l2a00 l2a10

               !a01 a11 a21! l2a01 l2a11

               !a02 a12 a22! l2a02 l2a12

         

 */

 total=a00*a11*a22 + a10*a21*a02 +a20*a01*a12;

 total=total+(a02*a11*a20)*-1 + (a12*a21*a00)*-1 + (a22*a01*a10)*-1;

if(total!=0)

{

    cout<<"Determinante 3x3: "<<total;

}

else{

    cout<<"Error el determinante da 0";

}

}