Go语言小白问题 输出不了图片，在控制台中输出了好多乱码

Question

代码如下

package main

import (
"image"
"image/color"
"image/png"
"math/cmplx"
"os"
)

func main() {
const (
xmin, ymin, xmax, ymax = -2, -2, +2, +2
width, height = 1024, 1024
)

img := image.NewRGBA(image.Rect(0, 0, width, height))
for py := 0; py < height; py++ {
    y := float64(py)/width*(ymax-ymin) + ymin
    for px := 0; px < width; px++ {
        x := float64(px)/width*(xmax-xmin) + xmin
        z := complex(x, y)
        img.Set(px, py, mandelbrot(z))
    }
}
png.Encode(os.Stdout, img)

}

func mandelbrot(z complex128) color.Color {
const iterations = 200
const contrast = 15
var v complex128
for n := uint8(0); n < iterations; n++ {
v = v*v + z
if cmplx.Abs(v) > 2 {
return color.Gray{255 - contrast*n}
}
}
return color.Black
}

执行结果是完全乱码，下图所示

Answer 1

https://jingyan.baidu.com/article/c33e3f48cf7ff9ea15cbb530.html