spline

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define comprimento 5
int main(){
	float x[comprimento]={0,0.5,1,1.5,2};
	float y[comprimento]={3,1.8616,-0.5571,-4.1987,-9.0536};
	int i;
	float h[comprimento];
	for(i=0;i<(comprimento-1); i++){
		h[i]=x[i+1]-x[i];
	}
	b[comprimento];
	for(i=0;i<(comprimento-2); i++){
		b[i]=6*((y[i+2]-y[i+1])/h[i+1] -(y[i+1]-y[i])/h[i]);
	}
	float v[9]={2,0.5,0,0.5,2,0.5,0,0.5,2};
	float A[3][3]={{2,0.5,0},{0.5,2,0.5},{0,0.5,2};
	// usar programa de eliminação de gauss
	return 0
}