一元二次方程的求解

#include<stdio.h>
#include<math.h>
#define MIN 0.00001
int main()
{
float a,b,c;
scanf("%f %f %f",&a,&b,&c);
if((a<MIN)&&(a>-MIN))
{
    printf("不是一元二次函数")；
}
else
{
    float disc=b*b-4*a*c;
    if((disc<MIN)&&(disc>-MIN))
    {
        printf("方程有两个相等的实根：\n");
        printf("x1=x2=%f\n",-b/(2*a));
    }
    else if(disc>0.0)
    {
        printf("有两个不相等实根：\");
        printf("x1=%f\n",(-b+sqrt(disc))/(2*a));
        printf("x2=%f\n",(-b-sqrt(disc))/(2*a));
    }
         else
         {
             printf("有一组共轭复根\n");
         }
}
return 0;
}