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nmmmnu/pi.2021.cc

Last active March 12, 2021 11:33
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pi.2021.cc
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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);
}
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