github.com/xushiwei/go@v0.0.0-20130601165731-2b9d83f45bc9/test/fixedbugs/bug321.go (about)

     1  // run
     2  
     3  // Copyright 2011 The Go Authors.  All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // Troublesome floating point constants. Issue 1463.
     8  
     9  package main
    10  
    11  import "fmt"
    12  
    13  func check(test string, got, want float64) bool {
    14  	if got != want {
    15  		fmt.Println(test, "got", got, "want", want)
    16  		return false
    17  	}
    18  	return true
    19  }
    20  
    21  func main() {
    22  	good := true
    23  	// http://www.exploringbinary.com/java-hangs-when-converting-2-2250738585072012e-308/
    24  	good = good && check("2.2250738585072012e-308", 2.2250738585072012e-308, 2.2250738585072014e-308)
    25  	// http://www.exploringbinary.com/php-hangs-on-numeric-value-2-2250738585072011e-308/
    26  	good = good && check("2.2250738585072011e-308", 2.2250738585072011e-308, 2.225073858507201e-308)
    27  	if !good {
    28  		panic("fail")
    29  	}
    30  }