erff.c

来自「numerical recipes in C source codes」· C语言 代码 · 共 8 行

float erff(float x)
{
	float gammp(float a, float x);

	return x < 0.0 ? -gammp(0.5,x*x) : gammp(0.5,x*x);
}
/* (C) Copr. 1986-92 Numerical Recipes Software "U,6VV'. */