求一元二次方程的解，这个程序为啥不能输出呢？🤔

Question

#include<stdio.h>
#include<math.h>
int main(){
double a,b,c;
double A;
scanf("%lf %lf %lf",&a,&b,&c);
A=bb-4ac;
double x,x1,x2;
if(A<0){
printf("No Answer");
};
if(A=0){
double B=sqrt(A);
x=(-b+B)/2*a;
printf("%.15f",x);
};
if(A>0){
double B=sqrt(A);
x1=(-b+B)/2a;x2=(-b-B)/2*a;
printf("%.15f %.15f",x1,x2);
};
return 0;
}

Answer 1

include<stdio.h>
#include<math.h>
int main()
{
    double a,b,c;
    double A;
    scanf("https://img-mid.csdnimg.cn/release/static/image/mid/ask/046236675236153.png "=600 #left")
%lf %lf %lf",&a,&b,&c);
    A=b*b-4*a*c;
    double x,x1,x2;
    if(A<0)
    {
        printf("No Answer");
    }

    if(A==0)
    {

        double B=sqrt(A);
        x=(-b+B)/(2*a);
        printf("%.15f",x);
    }
    if(A>0)
    {
    double B=sqrt(A);
    x1=(-b+B)/(2*a);x2=(-b-B)/(2*a);
    printf("%.15f %.15f",x1,x2);
    }
return 0;
}