新手入门问题答对有奖！

Question

#include
#include
void main()
{float a,b,c,t,x1,x2,x3,x4;
printf("please enter a,b,c:");
scanf("%f%f%f",&a&b&c);
if(a=0)
printf("yicihanshu");
else
t=b*b-4*a*c;
if(t<0)

printf("wushigen");
else if(t=0)
{
x3=-b/(2*a),x4=-b/(2*a);
printf("%f,%f",x1,x2);
}
else
x1=(-b+sqrt(t))/(2*a);x2=(-b-sqrt(t))/(2*a);

printf("%f%f",x1,x2);

}