Question

我的节目如下：

我尝试做的是看是否有办法创建一个随机函数或使用内置函数，该函数能够知道从随机选择中选择了该程序中的哪些食物并拥有它又没用过一个星期？我目前的食物从1-6开始，但我想确保例如2的相同食物连续两次连续选择一周。此外，我希望程序能够写出所选择的最后一项，以便它至少在一周内不再选择它。我能用一个可以读取的简单文本文件来完成这个吗？

package main

import (
    "fmt"
    "math/rand"
    "time"
)

type Recipe struct { //Struct for recipe information
    name        string
    prepTime    int
    cookTime    int
    Ingredients []string //this is now a slice that will accept multiple elements
    ID          int
    Yield       int
}

func main() {
    var recipe1 Recipe //Declare recipe1 of Type Recipe
    var recipe2 Recipe
    var recipe3 Recipe

    /* recipe1 specifications */
    recipe1.name = "BBQ Pulled Chicken"
    recipe1.prepTime = 25
    recipe1.cookTime = 5
    recipe1.Ingredients = append(
        recipe1.Ingredients,
        "1 8-ounce can reduced-sodium tomato sauce",
    )
    recipe1.Ingredients = append(
        recipe1.Ingredients,
        "1/2 medium onion (grated),",
    )
    recipe1.ID = 1
    recipe1.Yield = 8

    /* Recipe 2 specifications */

    recipe2.name = "Steak Tacos with Pineapple"
    recipe2.prepTime = 45
    recipe2.cookTime = 45
    recipe2.Ingredients = append(
        recipe2.Ingredients,
        "3 tablespoons soy sauce,",
    )
    recipe2.Ingredients = append(
        recipe2.Ingredients,
        "1 tablespoon finely grated garlic,",
    )
    recipe2.Ingredients = append(
        recipe2.Ingredients,
        "1 tablespoon finely grated peeled fresh ginger,",
    )
    recipe2.Ingredients = append(
        recipe2.Ingredients,
        "1 1/2 pounds skirt steak, cut into 5-inch lengths,",
    )
    recipe2.Ingredients = append(
        recipe2.Ingredients,
        "Salt",
    )
    recipe2.Ingredients = append(
        recipe2.Ingredients,
        "Pepper",
    )
    recipe2.ID = 2
    recipe2.Yield = 4

    recipe3.name = "Simple Lemon Herb Chicken"
    recipe3.prepTime = 10
    recipe3.cookTime = 15
    recipe3.Ingredients = append(
        recipe3.Ingredients,
        "2 skinless boneless chicken breast halves,",
    )
    recipe3.Ingredients = append(
        recipe3.Ingredients,
        "1 Lemon,",
    )
    recipe3.Ingredients = append(
        recipe3.Ingredients,
        "Salt and Pepper to taste,",
    )
    recipe3.Ingredients = append(
        recipe3.Ingredients,
        "1 tablespoon olive oil,",
    )
    recipe3.Ingredients = append(
        recipe3.Ingredients,
        "2 sprigs fresh parsley (for garnish),",
    )
    recipe3.Ingredients = append(
        recipe3.Ingredients,
        "1 pinch dried oregano,",
    )
    recipe3.ID = 3
    recipe3.Yield = 2

    //call to printRecipe function below
    printRecipe(recipe1)
    totalTime(recipe1)
    printRecipe(recipe2)
    totalTime(recipe2)
    printRecipe(recipe3)
    totalTime(recipe3)

    //choose random number for recipe
    rand.Seed(time.Now().UTC().UnixNano())
    myrand := random(1, 6)
    fmt.Println(myrand)

    //logic for recipe to choose
    if myrand == 1 {
        fmt.Println(1)
        printRecipeOfTheDay(recipe1)
    } else if myrand == 2 {
        fmt.Println(2)
        printRecipeOfTheDay(recipe2)
    } else if myrand == 3 {
        fmt.Println(3)
        printRecipeOfTheDay(recipe3)
    } else if myrand == 4 {
        fmt.Println(4)
    }
}

//function to print Recipe
func printRecipe(recipe Recipe) {
    fmt.Printf("Recipe Name : %s\n", recipe.name)
    fmt.Printf("Prep Time : %d\n", recipe.prepTime)
    fmt.Printf("Cook Time : %d\n", recipe.cookTime)
    fmt.Printf("Ingredients : %s\n", recipe.Ingredients)
    fmt.Printf("Recipe ID : %d\n", recipe.ID)
}

//random number function
func random(min, max int) int {
    return rand.Intn(max-min) + min
}

//function to print the winner for recipe of the day to use
//for either lunch or dinner
func printRecipeOfTheDay(recipe Recipe) {
    fmt.Printf("The recipe of the day is : %s\n", recipe.name)
}

//Returns total time by addings cookTime and prepTime
func totalTime(recipe Recipe) {
    fmt.Printf("The total time for this recipe is %d\n", recipe.cookTime+recipe.prepTime)
}

Answer 1

正如@Volker所说，Perm很可能是你想要使用的。这是一个为您生成伪随机列表的示例。您可以将其保存到json编码的文件中。然后，如果您有7个食谱，您可以使用time.Weekday从切片中获取食谱编号，使用星期几作为切片的关键。一旦你达到预定的一天，只需重新生成切片并保存。

package main

import "fmt"
import "math/rand"
import "time"

func main() {

  r := rand.New(rand.NewSource(time.Now().UnixNano()))
  i := r.Perm(6)
  fmt.Printf("%v\n", i)
}

Golang计划中的随机函数和持久性

1 个答案: