999887 - 経済統計練習帳

package math;
 
 
import org.apache.commons.math3.analysis.UnivariateFunction;
import org.apache.commons.math3.analysis.solvers.BisectionSolver;
import org.apache.commons.math3.analysis.solvers.UnivariateSolver;
 
class pro{
 
public static void main(String[] args) {
 
pro test=new pro();
}
 
pro(){
 
UnivariateSolver sol = new BisectionSolver();      
double re = sol.solve(100, f, 10, 90);
 
System.out.println(re);
 
 
 
}
 
UnivariateFunction f = new UnivariateFunction() {
public double value(double p) {
return  d(p)-s(p);
}   
};
 
double d(double p){
double d1;
    d1=100-p;
if(d1<0)d1=0;
return d1;
}
double s(double p){
double s1;
    s1=p;
if(s1<0)s1=0;
return s1;
}
 
}