You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: blackriper.go
    path of file: ./repos/retos-programacion-2023/Retos/Reto #38 - LAS SUMAS [Media]/go
    
    the code of the file until where you have to start completion: package main

import (
	"fmt"
	"strconv"
)

// definir me
    
func (d *DataSum) ReadData() {
	var opcion string
	for {
		fmt.Println("Introduce a positive number [E]End array Numbers ")
		fmt.Scanf("%s", &opcion)

		if opcion == "E" {
			fmt.Println("Introduce a Objective number to find combinate in the array numbers")
			fmt.Scanf("%d", &d.Objective)
			break
		} else {
			num, err := strconv.Atoi(opcion)
			if err != nil {
				panic(err)
			}
			d.Numbers = append(d.Numbers, num)
		}
	}
}