使用 gsl_root_fsolver_root()求解器求解四次方程根

[zhouzhou113]

根据官网例程写的解算器，win10+vs2005+gsl1.8 求解四方方程的根 定义了根的上下限，可以得到唯一解 放在工程中实时在线求解的时候不定期会报内存泄漏:Object dump complete.，有遇到相同情况的吗？ 检查了下发现 gsl 版本较低，更新成 2.4 版本后同样的问题

double rosenbrock_f3(double x, void * params)

{

double a = ((struct rparams *) params)->a;

double b = ((struct rparams *) params)->b;

double c = ((struct rparams *) params)->c;

double d = ((struct rparams *) params)->d;

double e = ((struct rparams *) params)->e;


double f = (1.0 / 4.0)*c*pow(x, 4) + (1.0 / 3.0)*b*pow(x, 3) + (1.0 / 2.0)*a*pow(x, 2) + d*x - e;

return f;

}

double ObtainRoot(double a, double b, double c, double d, double e, double t1) {

int status;
int iter = 0, max_iter = 100;
const gsl_root_fsolver_type *Type;
gsl_root_fsolver *ss;
double r = 0;
double x_lo = 0.0, x_hi = t1;//下限和上限
rparams alpha = { a, b, c, d, e };

gsl_function obtaint;
obtaint.function = &CVehicleExe::rosenbrock_f3;
obtaint.params = α

Type = gsl_root_fsolver_brent;
ss = gsl_root_fsolver_alloc(Type);
gsl_root_fsolver_set(ss, &obtaint, x_lo, x_hi);


do
{
	iter++;
	status = gsl_root_fsolver_iterate(ss);
	r = gsl_root_fsolver_root(ss);
	x_lo = gsl_root_fsolver_x_lower(ss);
	x_hi = gsl_root_fsolver_x_upper(ss);
	status = gsl_root_test_interval(x_lo, x_hi,0, 0.001);

	if (status == GSL_SUCCESS)
		printf("Converged:\n");

} while (status == GSL_CONTINUE && iter < max_iter);

double result = r;
gsl_root_fsolver_free(ss);

return result;

}

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