一元二次方程
#include<stdio.h>
#include<math.h>
int main()
{
float a,b,c,s,R1,R2;
scanf("%f%f%f",&a,&b,&c);
s=pow(b,2)-4*a*c;
if(s<0||a==0)
{
printf("Impossivel calcular");
}
else
{
R1=(-b+sqrt(s))/(2*a);
R2=(-b-sqrt(s))/(2*a);
printf("R1 = %.5f\n",R1);
printf("R2 = %.5f\n",R2);
return 0;
}
}