View Code of Problem 42

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main()//判断是否为闰年
{ double a,b,c,d;
  scanf("%lf%lf%lf",&a,&b,&c);
 d=b*b-4*a*c;
   printf("%.2lf %.2lf",(-b+sqrt(d))/(2*a),(-b-sqrt(d))/(2*a));

return 0;

}