#include "header.h"
vec createv(int n)
{
	vec x;
	x.n=n;
	x.fp = (float *) calloc(n,sizeof(float));
	return x;
}
int readv(vec *x)
{
	int i,n;
        int flag=1;     //the flag is used to decide if we continue to read vector from file, default set to 1 means the program will read vector at the first time.
	float tmp;
	vec *y;

        flag=scanf("%d",&n);//value of flag shows if the scaning succeed or not.
	if(flag!=1) return flag; 
        y=x;
	(*y).n=n;
	(*y).fp = (float *) calloc(n,sizeof(float));
	for(i=0;i<n;i++) 
	{
		scanf("%f",&tmp);
		(*y).fp[i]=tmp;
	}
	return 1;
}
void printv(vec x)
{
	int i;
	printf("%d\n",x.n);	
	for(i=0;i<x.n;i++)
	{
		printf("%f\n",x.fp[i]);
	}
	
}
void freev(vec *x)
{
    free((*x).fp);
}