函数分别求判别式大于0，等于0和小于0时的根，并输出结果主函数输出系数a,b,c.

Question

函数分别求判别式大于0，等于0和小于0时的根，并输出结果主函数输出系数a,b,c.

Answer 1

#include<stdio.h>
#include<math.h>
void dayu(double a,double b,double c);
void dengyu(double a,double b,double c);
void xiaoyu(double a,double b,double c);
int main()
{
double a,b,c;
scanf("%lf%lf%lf",&a,&b,&c);
if((bb-4ac)>0)
{
dayu(a,b,c);
}
else if((bb-4ac)==0)
{
dengyu(a,b,c);
}
else
{
xiaoyu(a,b,c);
}
return 0;
}
void dayu(double a,double b,double c)
{
double m=sqrt(bb-4ac);
printf("%lf %lf",(-b+m)/(2a),(-b-m)/(2a));
}
void dengyu(double a,double b,double c)
{
printf("%lf",(-b)/(2a));
}
void xiaoyu(double a,double b,double c)
{
double m=sqrt(4ac-bb);
printf("%lf %lf",(-b+m)/(2a),(-b-m)/(2*a));
}