github.com/karrick/go@v0.0.0-20170817181416-d5b0ec858b37/test/cmplxdivide.go (about)

     1  // run cmplxdivide1.go
     2  
     3  // Copyright 2010 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  // Driver for complex division table defined in cmplxdivide1.go
     8  // For details, see the comment at the top of cmplxdivide.c.
     9  
    10  package main
    11  
    12  import (
    13  	"fmt"
    14  	"math"
    15  )
    16  
    17  func calike(a, b complex128) bool {
    18  	if imag(a) != imag(b) && !(math.IsNaN(imag(a)) && math.IsNaN(imag(b))) {
    19  		return false
    20  	}
    21  
    22  	if real(a) != real(b) && !(math.IsNaN(real(a)) && math.IsNaN(real(b))) {
    23  		return false
    24  	}
    25  
    26  	return true
    27  }
    28  
    29  func main() {
    30  	bad := false
    31  	for _, t := range tests {
    32  		x := t.f / t.g
    33  		if !calike(x, t.out) {
    34  			if !bad {
    35  				fmt.Printf("BUG\n")
    36  				bad = true
    37  			}
    38  			fmt.Printf("%v/%v: expected %v error; got %v\n", t.f, t.g, t.out, x)
    39  		}
    40  	}
    41  	if bad {
    42  		panic("cmplxdivide failed.")
    43  	}
    44  }