package main

import "fmt"

func main(){
   var a int 
   a = 100
   var b int
   b = 2 
   per := float32(b/a) 
   fmt.Printf("打印百分比： %.2f%%\n",per)
   truePer := float32(b)/float32(a)
   fmt.Printf("真正可以打印百分比的: %.2f%%",truePer)
}