| // Copyright 2018 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. | |
| package main | |
| import "fmt" | |
| import "math/cmplx" | |
| func mandelbrot(a complex128) (z complex128) { | |
| for i := 0; i < 50; i++ { | |
| z = z*z + a | |
| } | |
| return | |
| } | |
| func main() { | |
| for y := 1.0; y >= -1.0; y -= 0.05 { | |
| for x := -2.0; x <= 0.5; x += 0.0315 { | |
| if cmplx.Abs(mandelbrot(complex(x, y))) < 2 { | |
| fmt.Print("*") | |
| } else { | |
| fmt.Print(" ") | |
| } | |
| } | |
| fmt.Println("") | |
| } | |
| } |