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

//define the type
typedef struct {int n; float *fp;}  Vector;        // used in problem A.
typedef struct {int n; int m; float *fp;}  Matrix; // will be used in problem B: n is the row; m is the column
typedef struct {int f;int df;int ddf;} Int3;       // will be used in problem B

//what these functions do? use your mind 
Vector CreateVector(int n);
Vector ReadVector();
void PrintVector(Vector x);
void DestroyVector(Vector x);
//function value of problem A 
int fA(Vector x,float *fp,int spec);