nmmmnu · March 12, 2021 11:33
diff --git a/pi.2021.cc b/pi.2021.cc
 #include <cstdio>

 using myfloat = double;

 constexpr size_t MAX = 2'500'000'000;

 int main(){
 	myfloat sum = 0;

 	myfloat const four = 4;

 	for(size_t i = 0; i < MAX; ++i)
 		sum += 1 / (four * i + 1) - 1 / (four * i + 3);

 	myfloat const pi = sum * four;

 	printf("%f\n", pi);
 }
	#include <cstdio>

	using myfloat = double;

	constexpr size_t MAX = 2'500'000'000;

	int main(){
	myfloat sum = 0;

	myfloat const four = 4;

	for(size_t i = 0; i < MAX; ++i)
	sum += 1 / (four * i + 1) - 1 / (four * i + 3);

	myfloat const pi = sum * four;

	printf("%f\n", pi);
	}