hey, i finally figured out my Code, but i need to export the answerto an externa

Question

hey, i finally figured out my Code, but i need to export the answerto an external File. the teacher posted an older code aboutexporting files, but when i run it in the C++, the program failsbecause of old headers (and the program itself does not really seemto do anything)

if this is my code, how would i export the very last line to afile? thanks alot.
also, what is the difference if i float all my Int and doubles, orif i use the code as below?  

*/

#include <iostream>
using namespace std;

int main()
{
    int D, DX, DY, A1, A2, B1, B2, C1, C2;
    double DX_Dem, DY_Dem;
    cout<<"Please Enter a1:";           //Prints prompt to user
   cin>>A1;                             // reads input from user
    cout<<"Please Enter b1: ";
    cin>>B1;
    cout<<"Please Enter c1: ";
    cin>>C1;
    cout<<"Please enter a2: ";
    cin>>A2;
    cout<<"Please enter b2: ";
    cin>>B2;
    cout<<"Please Enter c2: ";
    cin>>C2;

   D=(A1*B2)-(A2*B1);            // performs calculations and stores results
    DX=(C1*B2)-(C2*B1);
    DY=(A1*C2)-(A2*C1);
  
    cout<<"D    = "<< D<< endl;   // prints output
    cout<<"D(x) = "<< DX <<endl;
    cout<<"D(y) = "<< DY <<endl;
  
    DX_Dem=DX/(double)D;
    DY_Dem=DY/(double)D;
  
    cout<<"X = "<< DX<<"/"<<D <<" = "<< DX_Dem << endl; // printsoutput
    cout<<"Y = "<< DY<<"/"<<D <<" = "<< DY_Dem << endl;
    cout<<"Solution Set is {("<< DX_Dem<<","<< DY_Dem <<")}"<< endl;

    system("pause");
    return 0;
    }

Explanation / Answer

please rate - thanks what is the difference if i float all my Int and doubles, or if iuse the code as below?   it would make no difference. for this code. I would leave it as itis #include #include using namespace std; int main() {     int D, DX, DY, A1, A2, B1, B2, C1, C2;     double DX_Dem, DY_Dem;    ofstream out;     coutA1;     coutB1;     coutC1;     coutA2;     coutB2;     coutC2;     D=(A1*B2)-(A2*B1);     DX=(C1*B2)-(C2*B1);     DY=(A1*C2)-(A2*C1);        cout

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