Program C++ Persamaan kuadrat

Persamaan kuadrat menggunakan looping while

/*program menghitung persamaan kuadrat while looping*/

#include<stdio.h>

#include<conio.h>

#include<iostream.h>

#include<stdlib.h>

main(void)

{

int a,b,c;

float X1,X2,D;

char karakter;

awal:

clrscr();

gotoxy(15,10);printf("Program Menghitung Akar Persamaan Kuadrat");

gotoxy(17,12);printf("silahkan masukan nilai a,b,dan c, :\n");

gotoxy(28,14);printf("nilai a:");scanf("%d",&a);

gotoxy(28,15);printf("nilai b:");scanf("%d",&b);

gotoxy(28,16);printf("nilai c:");scanf("%d",&c);

D=b*b-4*a*c;

while(a,b,c!=0)

                {

                X1=((-b+D)/2*a);

                X2=((-b-D)/2*a);

                gotoxy(21,17);printf("Hasil Persamaan Kuadrat: \n");

                gotoxy(28,18);printf("X1=%3.2f\n", X1);

                gotoxy(28,19);printf("X2=%3.2f\n", X2);

                break;

                }

                gotoxy(21,21);printf("tekan Y atau y untuk kembali");

                karakter=getche();

                while ((karakter=='y') || (karakter=='Y'))

                goto awal;

                clrscr();

}