little_w

摘要： double func(double a, double b, double x) { double r = a * exp(- x*x) + b * sqrt(x); return r*r;//return的积分常数，例如这里f（x*x）dx|[0,h]}double integrate(double a, double b, double h) { unsigned long steps = 1, it = 1; double V = h * (func(a, b, 0) + func(a, b, h)) / 2.0; double Vold; do { double t... 阅读全文