Program menentukan akr" persamaan kuadrat

Algoritma...

 ANALISIS 

Input : A, B, C

Proses :mencari persamaan akar-akar kuadrat

Output : akar-akar kuadrat

DEKLARASI

A, B, C : integer {koefisien-koefisien persamaan}

                                                                                                                          
disk : longint {nilai diskriminan}

x1, x2 : real {nilai-nilai akar untuk disk>=0}

DESKRIPSI

read (A, B, C)

disk ← B*B – 4*A*C

if (A = 0) then write (‘Bukan Persamaan Kuadrat’)

else if disk > 0 then

x1 ← -B + sqrt (disk)/2*A

x2 ← -B – sqrt(disk)/2*A

else if disk = 0 then

x1 ← -B/2*A

x2 ← x1

else write (‘Akar imajiner’)

end if

write (x1,x2)

Program C++(class)

#include <iostream>

#include <math.h>

#include <conio.h>

using namespace std;

class faktorial

{

public:

 int proses();

private:

   int   A, B, C;     

   long  disk;        

   float x1, x2; 

};

int faktorial::proses(){

cout << "Koefisien pangkat 2   : "; cin >> A;

     cout << "Koefisien pangkat 1   : "; cin >> B;

     cout << "Koefisien pangkat 0   : "; cin >> C;

     if (A == 0) {

        cout << "bukan pers. kuadrat.\n";

        cout << "Harga akar = " << -C/B; }  else {

          disk = B*B - 4*A*C;

          if (disk > 0) {     

             x1 = -B+sqrt(disk)/(2*A);

             x2 = -B-sqrt(disk)/(2*A);

             cout << "diskriminan = " << disk << endl;

             cout << "x1 = " << x1 << endl;

             cout << "x2 = " << x2 << endl;

          }  else if (disk == 0) { 

                     x1 = -B/(2*A);   x2 = x1;

             cout << "diskriminan = 0\n";

             cout << "x1 = " << x1 << endl;

             cout << "x2 = " << x2 << endl;

             } else cout << "Akar imajiner";

     }

}

int main(int argc, char** argv) {

faktorial x;

x.proses();

return 0;

}

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