OJ-Problems-Source/QUSTOJ/1724.c
2016-04-28 08:39:28 +08:00

35 lines
528 B
C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define DUR 0.001
double func(double x)
{
return (2*x*x*x)-(4*x*x)+3*x-6;
}
double dfs(double L, double Mid, double R)
{
int t;
if(R-L < DUR) return R;
if(func(L)*func(Mid) <=0)
{
t= dfs(L,(L+Mid)/2,Mid);
}
else if(func(Mid)*func(R) <=0)
{
t= dfs(Mid,(Mid+R)/2,R);
}
return t;
}
int main()
{
double a, b, c;
scanf("%lf,%lf",&a,&c);
b = (a+c)/2;
printf("x=%6.2f\n",dfs(a,b,c));
return 0;
}