在Go中将float64转换为int

如果它只是从float64到int，这应该工作

 package main import ( "fmt" ) func main() { nf := []float64{-1.9999, -2.0001, -2.0, 0, 1.9999, 2.0001, 2.0} //round fmt.Printf("Round : ") for _, f := range nf { fmt.Printf("%d ", round(f)) } fmt.Printf("\n") //rounddown ie. math.floor fmt.Printf("RoundD: ") for _, f := range nf { fmt.Printf("%d ", roundD(f)) } fmt.Printf("\n") //roundup ie. math.ceil fmt.Printf("RoundU: ") for _, f := range nf { fmt.Printf("%d ", roundU(f)) } fmt.Printf("\n") } func roundU(val float64) int { if val > 0 { return int(val+1.0) } return int(val) } func roundD(val float64) int { if val < 0 { return int(val-1.0) } return int(val) } func round(val float64) int { if val < 0 { return int(val-0.5) } return int(val+0.5) } 

输出：

 Round : -2 -2 -2 0 2 2 2 RoundD: -2 -3 -3 0 1 2 2 RoundU: -1 -2 -2 0 2 3 3