为什么结果不对啊
#include<stdio.h>
#include<math.h>
int main()
{
double a, b ,c,disc,x1,x2,realpart,imagpart;
scanf("%lf %lf lf%",&a,&b,&c);
printf("the equation ");
if(fabs(a)<=1e-6)
{
printf("is not a quadratic!\n");
printf("x1 = x2 = %lf",-(c/b));
}
else
{
disc = b*b-4*a*c;
if(fabs(disc)<=1e-6)
{
printf("has two equal roots:%lf\n",-b/(2*a));
}
else
{
if(disc>1e-6)
{
x1 = (-b+sqrt(disc))/2*a;
x2 = (-b-sqrt(disc))/2*a;
printf("has two real roots :%lf and %lf \n",x1,x2);
}
else
{
realpart = -b/(2*a);
imagpart = sqrt(-disc)/(2*a);
printf("has complex roots :\n");
printf("%lf + %lfi\n",realpart,imagpart);
printf("%lf - %lfi\n",realpart,imagpart);
}
}
}
return 0;
}
