phonebook.go

package main

import "fmt"
import "os"
import "os/exec"
import "io"
import "strings"

func cls(){
	cmd := exec.Command("cmd", "/c", "cls")
	cmd.Stdout = os.Stdout
	cmd.Run()
}

type phonebook struct{
	name string
	phone int
}

func (p phonebook) write_to_file() {
	f,err := os.OpenFile("phonebook.txt",os.O_APPEND|os.O_CREATE,0666)
	if err != nil {
		return
	}
	fmt.Fprintf(f,"%s\t%d\n",p.name,p.phone)
	defer f.Close()
}

func search_contact(name string) []string{
	f,err := os.Open("phonebook.txt")
	if err != nil {
		fmt.Println("error")
	}
	var x string
	var y int
	p_cache := make(map[string]int)
	for {
	_,err := fmt.Fscanf(f,"%s\t%d\n",&x,&y)
	p_cache[x] = y
	if err == io.EOF {
		break
	}
}
	var s []string
	for n,_ := range(p_cache){
		if strings.Contains(n,name){
			s=append(s,n)	
		}
	}
	return s
}

func main(){
	var x int
L:	for {
		fmt.Println("Enter a choice\n1.New Contact\n2.Edit Contact\n3.Search Contact\n4.Delete Contact\n5.Exit")
		fmt.Scanf("%d\n",&x)
		switch x {
		case 1:
			cls()
			fmt.Println("Enter name and phone")
			var n string 
			var ph int
			fmt.Scanf("%s\n%d\n",&n,&ph)
			p:=phonebook{n,ph}
			p.write_to_file()
			cls()
			fallthrough
		case 2:

		case 3:
			cls()
			fmt.Println("Enter name to search")
			var (
				n string
				slice []string)
			fmt.Scanf("%s\n",&n)
			slice = search_contact(n)
			fmt.Println(slice)
			fallthrough

		case 4:

		case 5:
			break L
		default:
			fmt.Println("Invalid Choice")
	}	
}
}

under progress