solved bitcount

Dependencies

• [2] BW2CMZHK WIP: solving protobuf-varint

Change contents

• file addition: intro-to-c (d--r------)
  [2.4]
• file addition: bitcount.zig (----------)
  [0.5]
  + // https://csprimer.com/watch/bitcount/

  +

  + const std = @import("std");

  +

  + test "count bits works" {

  + try std.testing.expectEqual(@as(u64, 0), bitcount(0));

  + try std.testing.expectEqual(@as(u64, 1), bitcount(1));

  + try std.testing.expectEqual(@as(u64, 2), bitcount(3));

  + try std.testing.expectEqual(@as(u64, 1), bitcount(8));

  + }

  +

  + fn bitcount(n: u64) u8 {

  + return @popCount(n);

  + }