Remove comments from Go/C program (simple way)

removecomment.go

package main

import bufio "bufio"
import fmt "fmt"
import os "os"

func main() {
    var state = "0"
    var cache = " "
    
    file, err := os.Open("test.txt")

    if err != nil {
        fmt.Printf("Error: %s", err)
    }
    
    reader := bufio.NewReader(file)
    cache = ""

    charcode, err := reader.ReadByte() 
    for err == nil {

      character := string(charcode) // To one-symbol string

      switch state {
        case "0":  // Start
            switch character {
                case "\"":
                    state = "S"
                    fmt.Printf("%s", character)
                case "/":
                    state = "2"
                    cache = character
                default:
                   fmt.Printf("%s%s", cache, character)
                   cache = ""
            }
            cache = ""
        case "1":  // escape symbol inside string
            state = "S"
            fmt.Printf("%s", character)
        case "2":  // first slash met
            switch character {
                case "/":
                    state = "C"
                    cache = ""
                case "*":
                    state = "MC"
                    cache = ""
                default:
                    state = "0"
                    fmt.Printf("%s%s", cache, character)
                    cache = ""
            }
            //cache = character
        case "3":  // star met inside multiline comment
            switch character {
                case "/":
                    state = "0"
                default:
                    state = "MC"
            }
        case "S":  // String
            switch character {
                case "\"":
                    state = "0"
                case "/":
                    state = "1"
            }
            fmt.Printf("%s", character)
        case "C":  // Comment
            switch character {
                case "\n":
                    state = "0"
                    fmt.Printf("%s", character)
            }
        case "MC": // Multiline comment
            switch character {
                case "*":
                    state = "3"
            }
      }

      charcode, err = reader.ReadByte()
    }

}