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https://github.com/golang/go
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62 lines
1.0 KiB
Go
62 lines
1.0 KiB
Go
// run
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test complex numbers,including fmt support.
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// Used to crash.
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package main
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import "fmt"
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const (
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R = 5
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I = 6i
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C1 = R + I // ADD(5,6)
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)
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func want(s, w string) {
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if s != w {
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panic(s + " != " + w)
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}
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}
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func doprint(c complex128, w string) {
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s := fmt.Sprintf("%f", c)
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want(s, w)
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}
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func main() {
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// constants
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s := fmt.Sprintf("%f", -C1)
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want(s, "(-5.000000-6.000000i)")
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doprint(C1, "(5.000000+6.000000i)")
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// variables
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c1 := C1
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s = fmt.Sprintf("%f", c1)
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want(s, "(5.000000+6.000000i)")
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doprint(c1, "(5.000000+6.000000i)")
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// 128
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c2 := complex128(C1)
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s = fmt.Sprintf("%G", c2)
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want(s, "(5+6i)")
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// real, imag, complex
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c3 := complex(real(c2)+3, imag(c2)-5) + c2
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s = fmt.Sprintf("%G", c3)
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want(s, "(13+7i)")
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// compiler used to crash on nested divide
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c4 := complex(real(c3/2), imag(c3/2))
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if c4 != c3/2 {
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fmt.Printf("BUG: c3 = %G != c4 = %G\n", c3, c4)
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panic(0)
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}
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}
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