A very scary for loop

Changes

1 changed files (+9/-0)

• fast-pow/pow.cpp (new)
  • @@ -0,0 +1,9 @@
    + #include <iostream> + #include <numbers> + + auto pw(auto b,int e){auto r=b;for(--e<<=1;e>>=1;r*=(e&1)*b,b*=b);return r;} + + int main() { + std::cout << pw(2, 4) << std::endl; + std::cout << pw(std::numbers::e, 2) << std::endl; + }