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golang 处理浮点数的疑问
source link: https://www.v2ex.com/t/894739
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由于浮点数和整数直接相乘，有丢失精度的问题，查了查资料用了第三方的库 github.com/shopspring/decimal
num2 := 512
num1 := 2.7
d, _ := decimal.NewFromFloat(num1).Mul(decimal.NewFromInt(int64(num2))).Float64()
fmt.Printf("d = %f", d)
测试计算结果是 1382.400024 ，好像也不是准确的数字啊？
update: 好像从数据库取出来的 num1(float 类型)就不精确，难道要用 string 来存储比较好么。。。。
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