standard/decimal/test/main.go

package main

import (
	"fmt"

	"github.com/shopspring/decimal"
)

/*
	IsInteger() 检查是否是整数
	Mul() 相乘
*/

func main() {
	amount := decimal.NewFromFloat32(3.273).Mul(decimal.NewFromInt(100))
	fmt.Println(amount.BigFloat())  //327.3
	fmt.Println(amount.IsInteger()) //false

	amount = decimal.NewFromFloat32(3).Mul(decimal.NewFromInt(100))
	fmt.Println(amount.BigFloat())  // 300
	fmt.Println(amount.IsInteger()) // true

	amount = decimal.NewFromFloat32(3.2).Mul(decimal.NewFromInt(100))
	fmt.Println(amount.BigFloat())  // 320
	fmt.Println(amount.IsInteger()) // true

	amount = decimal.NewFromFloat32(3.09).Mul(decimal.NewFromInt(100))
	fmt.Println(amount.BigFloat())  // 309
	fmt.Println(amount.IsInteger()) // true
}