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practical_exercises/10_day_practice/day2/compute.cpp
26 строк
606 B
zhangxing
support bazel complie this project and format code.
30 мар 2024, 17:00
30 мар 2024, 17:00
3c8a3f2
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/* 求π.cpp */ #include <iostream> using namespace std; double arctan(double x); int main(int argc, char const *argv[]) { double a = 16.0 * arctan(1.0 / 5.0); double b = 4.0 * arctan(1.0 / 239.0); double pi = a - b; cout << pi << endl; return 0; } double arctan(double x) { double head = x; int tail = 1; double art = 0; while (double(head / tail) > 1e-15) { art = (tail % 4 == 1) ? art + head / tail : art - head / tail; head *= x * x; tail += 2; cout << "---------------" << endl; cout << tail << endl; cout << "---------------" << endl; } return art; }