#include<iostream.h>//一元二次方程
#include<math.h>
void wujie();
void yijie(double a,double b,double c);
void liangjie(double a,double b,double c);
void main()
{double a,b,c,d;
cout<<"请依次输入a,b,c"<<endl;
cin>>a>>b>>c;
 d=b*b-4*a*c;
 if(d<0)
 {void wujie();
 }
   if(d=0)
   {void yijie(double a,double b,double c);
   }
   else
   void liangjie(double a,double b,double c);
   
}

 void wujie()
 {   
    cout<<"方程无解"<<endl;   
   
 }
 void yijie(double a,double b,double c)
 {
 double x1,d;
 {d=b*b-4*a*c;
    x1=(-1*b)/(2*a);
cout<<"该方程只有一解"<<"x="<<x1<<endl;
   
 }   
 void liangjie(double a,double b,double c)
 {double d,x1,x2;
     d=b*b-4*a*c;
    x1=(-1*b+sqrt(d))/(2*a);
    x2=(-1*b-sqrt(d))/(2*a);
cout<<"该方程有两解"<<"x1="<<x1<<" "<<"x2="<<x2<<endl;   
 }


报错error C2601: 'liangjie' : local function definitions are illegal
报错fatal error C1004: unexpected end of file found