1 // run 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 // Test complex numbers,including fmt support. 8 // Used to crash. 9 10 package main 11 12 import "fmt" 13 14 const ( 15 R = 5 16 I = 6i 17 18 C1 = R + I // ADD(5,6) 19 ) 20 21 func want(s, w string) { 22 if s != w { 23 panic(s + " != " + w) 24 } 25 } 26 27 func doprint(c complex128, w string) { 28 s := fmt.Sprintf("%f", c) 29 want(s, w) 30 } 31 32 func main() { 33 34 // constants 35 s := fmt.Sprintf("%f", -C1) 36 want(s, "(-5.000000-6.000000i)") 37 doprint(C1, "(5.000000+6.000000i)") 38 39 // variables 40 c1 := C1 41 s = fmt.Sprintf("%f", c1) 42 want(s, "(5.000000+6.000000i)") 43 doprint(c1, "(5.000000+6.000000i)") 44 45 // 128 46 c2 := complex128(C1) 47 s = fmt.Sprintf("%G", c2) 48 want(s, "(5+6i)") 49 50 // real, imag, complex 51 c3 := complex(real(c2)+3, imag(c2)-5) + c2 52 s = fmt.Sprintf("%G", c3) 53 want(s, "(13+7i)") 54 55 // compiler used to crash on nested divide 56 c4 := complex(real(c3/2), imag(c3/2)) 57 if c4 != c3/2 { 58 fmt.Printf("BUG: c3 = %G != c4 = %G\n", c3, c4) 59 panic(0) 60 } 61 } 62
