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Source file test/235.go

Documentation: test

  // run
  
  // Copyright 2009 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // Solve the 2,3,5 problem (print all numbers with 2, 3, or 5 as factor) using channels.
  // Test the solution, silently.
  
  package main
  
  type T chan uint64
  
  func M(f uint64) (in, out T) {
  	in = make(T, 100)
  	out = make(T, 100)
  	go func(in, out T, f uint64) {
  		for {
  			out <- f*<-in
  		}
  	}(in, out, f)
  	return in, out
  }
  
  
  func min(xs []uint64) uint64 {
  	m := xs[0]
  	for i := 1; i < len(xs); i++ {
  		if xs[i] < m {
  			m = xs[i]
  		}
  	}
  	return m
  }
  
  
  func main() {
  	F := []uint64{2, 3, 5}
  	var n = len(F)
  	OUT := []uint64{
  		2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 27, 30, 32, 36,
  		40, 45, 48, 50, 54, 60, 64, 72, 75, 80, 81, 90, 96, 100, 108, 120, 125,
  		128, 135, 144, 150, 160, 162, 180, 192, 200, 216, 225, 240, 243, 250,
  		256, 270, 288, 300, 320, 324, 360, 375, 384, 400, 405, 432, 450, 480,
  		486, 500, 512, 540, 576, 600, 625, 640, 648, 675, 720, 729, 750, 768,
  		800, 810, 864, 900, 960, 972, 1000, 1024, 1080, 1125, 1152, 1200, 1215,
  		1250, 1280, 1296, 1350, 1440, 1458, 1500, 1536, 1600}
  
  	x := uint64(1)
  	ins := make([]T, n)
  	outs := make([]T, n)
  	xs := make([]uint64, n)
  	for i := 0; i < n; i++ {
  		ins[i], outs[i] = M(F[i])
  		xs[i] = x
  	}
  
  	for i := 0; i < len(OUT); i++ {
  		for i := 0; i < n; i++ {
  			ins[i] <- x
  		}
  
  		for i := 0; i < n; i++ {
  			if xs[i] == x {
  				xs[i] = <-outs[i]
  			}
  		}
  
  		x = min(xs)
  		if x != OUT[i] {
  			println("bad: ", x, " should be ", OUT[i])
  			panic("235")
  		}
  	}
  }
  

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