Program Mencari Akar Imajiner

#include <iostream>
#include <math.h>
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;

int main(int argc, char** argv) {
 
   int a,b,c;
   int x1,x2;
   double disk;

cout<<"\t\tPROGRAM MENCARI AKAR IMAJINATER"<<endl<<endl;
cout<<"Masukan Koefisien A: ";
cin>>a;
cout<<"Masukan Koefisien B: ";
cin>>b;
cout<<"Masukan Koefisien C: ";
cin>>c;

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

if(disk==0){
x1 =-b/2*a;
x2 =x1;
}else{
    if(disk>0){
        x1 =(-b+sqrt(disk))/(2*a);
        x2 =(-b-sqrt(disk))/(2*a);
      }else{
    cout<<"Akar Imajinatier"<<endl;
}
}

   return 0;
}