单片机四个按键模拟车门，数码管显示状态，没有按下去显示1,按下去显示0，求仿真电路和编程

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#include<iostream>#include<math.h>using namespace std;float p,q;void m(int a,int b,int c,float d){ p=(-b+sqrt(d))/(2*a); q=(-b-sqrt(d))/(2*a); cout<<"x1=<<p<<" "<<"x2="<<q<<;}void f(int a,int b,int c,float d){ p=-b/(2*a); cout<<"x1=x2="<<p<<endl;}void j(int a,int b,int c,float d){ cout<<"无实根"<<endl;}int main(){ int a,b,c; float d; cout<<"Input A B C"<<endl; cin>>a>>b>>c; d=b*b-4.0*a*c; if(d>0) { m(a,b,c,d); } else if(d==0) { f(a,b,c,d); } else { j(a,b,c,d); } cout<<endl; return 0;}