三次样条插值

#include<iostream.h>
#include<fstream.h>
#include<math.h>
#include<iomanip.h>
#include<process.h>
//using namespace std;
class cspline
{
private:
int i,n;
double term,term1,term2,term3,term4,term5,term6,a,b,r,t1,t2,t3,t4;
double *x,*y,*v,*gamma,*c,*beta,*f;
public:
    cspline(){term=term1=term2=term3=0.0;}
void input();
void spline_deriv();
~cspline(){delete []x,y,v,gamma,c,beta,f;}

};
int main()
{
cspline reg;
reg.input();
reg.spline_deriv();
return 0;
}
void cspline::input()
{
ifstream fin("p3.txt");
fin>>n;