Question

我这里有一个程序真的开始让我感到困惑（主要是因为我尝试了不同的方法让它工作并且每次都遇到某种错误）。我应该通过随机生成6个数字并让用户输入6个他们自己选择的数字来创建一个模拟真实生活彩票的程序。现在程序应该对两个数组进行线性搜索，看看是否有任何用户的数字等于随机生成的数字，但是我被教导使用线性搜索的方式不包括一次搜索多个数字（即因此我很困惑如何返回一个整数，如果大于零，则打印“你赢了”语句，如果小于零则打印“你丢失了语句”。

import java.util.*;
import java.text.*;

public class Lotto649 {

public static void main(String[] args) {
    Scanner s = new Scanner (System.in);


    int [] playernums = new int [6];
    int [] usernums = new int [6];
    int [] result = new int [6];
    int verdict;
    int index;

    System.out.printf ("Play Lotto 649 %n%n");

    // Get randomly generated numbers from method and add them to array 'result'
    result = GenerateLotto (playernums);


    // get 6 numbers from user 
    for (int j = 0; j < usernums.length; j++){
        System.out.printf ("Please enter a number between 1 and 49: ");
        usernums[j] = s.nextInt();
    }

    // Print the winning numbers that were randomly generated
    for (int i = 0; i < result.length; i++){
    System.out.printf ("The winning Lotto 649 numbers are: " + result[i] + ", ");
    }

}

// Method to fill array with winning lottery numbers 
public static int [] GenerateLotto (int [] a){
    Random g = new Random();

    // fill array with 6 randomly generated numbers 
    for (int i = 0; i < a.length; i++){
            a[i] = g.nextInt (49) + 1;
    }

    return a;
}

index = find (playernums,results);


// int [] A is player nums (player chosen numbers) 
// int [] B is results array (RNG numbers)
public static int find (int[] A, int[] B){

    for (int index = 0; index < A.length; index++){
        for (int index2 = 0; index2 < B.length; index2++){
            if (A[index] == B[index2])
                        return index;
    }
    }
}
}

我现在已经停止搞乱代码，因为我觉得我会进一步打破它。

Answer 1

你有一些编译时错误，请你试试下面的代码谢谢

import java.util.*; 


public class Lotto649 {

public static void main(String[] args) {
    Scanner s = new Scanner (System.in);


    int [] playernums = new int [6];
    int [] usernums = new int [6];
    int [] result = new int [6];
    int verdict;
    int index;

    System.out.printf ("Play Lotto 649 %n%n");

    // Get randomly generated numbers from method and add them to array 'result'
    result = GenerateLotto(playernums);


    // get 6 numbers from user 
    for (int j = 0; j < usernums.length; j++){
        System.out.printf ("Please enter a number between 1 and 49: ");
        usernums[j] = s.nextInt();
    }

    // Print the winning numbers that were randomly generated
    for (int i = 0; i < result.length; i++){
    System.out.printf ("The winning Lotto 649 numbers are: " + result[i] + ", ");
    }

    int wonOrLost = find (usernums,result);
    if(wonOrLost > 0)
        System.out.println("You've won");
    else
        System.out.println("You've lost statement");

}

// Method to fill array with winning lottery numbers 
public static int [] GenerateLotto (int [] a){
    Random g = new Random();

    // fill array with 6 randomly generated numbers 
    for (int i = 0; i < a.length; i++){
            a[i] = g.nextInt (49) + 1;
    }

    return a;
}




// int [] A is player nums (player chosen numbers) 
// int [] B is results array (RNG numbers)
public static int find (int[] A, int[] B){

    for (int index = 0; index < A.length; index++){
        for (int index2 = 0; index2 < B.length; index2++){
            if (A[index] == B[index2])
                        return 1;
    }
    }
    return -1;
}
}

Answer 2

此解决方案效果很好：

import java.util.*; 
import java.text.*;

public class Lotto649 {

    public static void main(String[] args) {
        Scanner s = new Scanner (System.in);

        int[] playernums = new int[6];
        int [] usernums = new int [6];
        int [] result = new int [6];
        int input;
        int verdict;

        System.out.printf ("Play Lotto 649 %n%n");

        // Get randomly generated numbers from method and add them to array 'result'
        result = GenerateLotto (playernums);


        // get 6 numbers from user 
        for (int j = 0; j < usernums.length; j++){
            System.out.printf ("Please enter a number between 1 and 49: ");
            input = Integer.parseInt(s.nextLine());

            if (input < 1 || input > 49) {  // Check if input is less than 1 or 49
                System.out.println("Sorry, you must enter a number between 1 and 49.");
                j--;                        // Decrement j so it asks for the number again (without decrementing there wouldn't be 6 total numbwrs).
            } else {
                usernums[j] = input;        // Store user input into usernums
            }
        }

        // Print the winning numbers that were randomly generated
        System.out.printf ("The winning Lotto 649 numbers are: ");
        for (int i = 0; i < result.length; i++) {
            if (i < result.length - 1)  
                System.out.print(result[i] + ", ");
            else 
                System.out.print(result[i]);
        }

        verdict = find(result, usernums);

        if (verdict == 0) {
            System.out.println("\nYou had no winning numbers. Thanks for wasting your money and making us rich!");
        } else {
            System.out.println("\nYou had " + verdict + " matches. Looks like we need to cough up the prize money.");
        }

    }   

    // Method to fill array with winning lottery numbers 
    public static int [] GenerateLotto (int [] a){
        Random g = new Random();

        // fill array with 6 randomly generated numbers 
        for (int i = 0; i < a.length; i++){
            a[i] = g.nextInt (49) + 1;
        }

        return a;
    }

    //  index = find (playernums,results);


    // int [] A is player nums (player chosen numbers) 
    // int [] B is results array (RNG numbers)
    public static int find (int[] A, int[] B) {
        int matches = 0;
        for (int index = 0; index < A.length; index++){
            for (int index2 = 0; index2 < B.length; index2++) {
                if (A[index] == B[index2])
                    matches++;
            }
        }
        return matches;
    }
}

如果你喜欢这个解决方案，请给我一个好评。

如何在彩票计划中进行线性搜索

2 个答案: