1028看看他的数再写吧

解题思路:

注意事项:

参考代码:#include<stdio.h>

#include<math.h>

int main()

{

   float a,b,c,d,x1,x2,p,q;

scanf("%f%f%f",&a,&b,&c);

d=b*b-4*a*c;

if(fabs(d)<=1e-6)

printf("x1=x2=%.3f\n",-b/(2*a));

else

{if(d>1e-6){x1=(-b+sqrt(d))/(2*a);

x2=(-b-sqrt(d))/(2*a);

printf("x1=%.3f,x2=%.3f\n",x1,x2);}

else

{p=-b/(2*a);

q=sqrt(fabs(d))/(2*a);

printf("x1=%.3f+%.3fi\n",p,q);

printf("x2=%.3f-%.3fi\n",p,q);

  }

}

    return 0;

}