calculate displacement at time t using functions as variables in golang

displacement.go

package main

import (
  "fmt"
  "math"
)

func main() {
  var acceleration, velocity, displacement, time float64

  fmt.Print("Enter the acceleration: ")
  fmt.Scan(&acceleration)
  fmt.Print("Enter the velocity: ")
  fmt.Scan(&velocity)
  fmt.Print("Enter the displacement: ")
  fmt.Scan(&displacement)
  fmt.Print("Enter the time:  ")
  fmt.Scan(&timeS)

  fn := GenDisplaceFn(acceleration, velocity, displacement)
  fmt.Printf("The displacement at time t=%s is: %v\n", time, fn(time))

}

func GenDisplaceFn(acceleration, velocity, displacement float64) func (time float64) (float64) {
  return func (time float64) (float64){
    return float64(1/2) * acceleration * math.Exp(time) + velocity * time + displacement
  }
}