#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
double fungpoli (double a,double b,double c,double d,double x) {
return a *x*x*x*+b*x*c*x+d;
}
double penAcak (double a,double b,double c,double d,double awal, double akhir,int interasi) {
srand(time(0));
double maksY=fungpoli(a,b,c,d,awal);
double maksX=awal;
for (int i = 1;i <= interasi;i++) {
double x =awal+((double)rand() / RAND_MAX) * (akhir -awal);
double hasil = fungpoli(a,b,c,d,x);
if(hasil >maksY) {
maksY =hasil;
maksX = x;
}
}
return maksX;
}
int main() {
double a,b,c,d;
cout << "masukan koefisien a,b,c,dan d:" << endl;
cin>>a>>b>>c>>d;
double awal,akhir;
cout << "masukkan nilai awal dan akhir dari x: " << endl;
cin>>awal>>akhir;
int iterasi;
cout <<"masukan jumlah iterasi:";
cin >> iterasi;
double maksX = penAcak(a,b,c,d,awal,akhir,iterasi);
double maksY = fungpoli(a,b,c,d,maksX);
cout << "Nilai x untuk fungsi maksimum/minimum = " << maksX << endl;
cout << "Nilai fungsi kuadrat pada x =" <<maksX <<"adalah" << maksY <<endl;
system("POUSE") ;
return 0;
}
