Question

新手程序员在这里，使用Java 8.我正在尝试构建一个PacMan游戏并正在研究构建网格的方法。我对该计划的开场评论告诉您需要知道的一切。我一直试图将随机#generator的变量连接到打印相同数量的cookie（＆＃34; O＆＃34;），并用点填充数组的其余部分（＆＃34; ;＆＃34;。）

/**
* This program is meant to get dimensions for a 2D array from the player.
* A grid is then displayed to player's specs filled with dots and cookies.
* The cookies must compose 20% of the total grid and be randomly  
* distributed. The user will then be offered a menu of options to either 
* turn left or right, or move, or exit the game. The player's choice moves 
* "PacMan" around grid to eat cookies. The grid must be displayed throughout
* the game showing changes as player continues moves. If a cookie is eaten, 
* a statement is printed that indicates a cookie was eaten and adds 1 to 
* your score. At the end of the game, it tracks the number of moves it took 
* to eat all the cookies.
*/

import java.util.Scanner;

public class PacManGame
{
public static void main(String[] args)
{
int X, Y;     //Variables for number of grid rows X, and columns Y   

Scanner input = new Scanner( System.in );

System.out.println();
System.out.print( "Enter the number of rows you would like in your game grid: " );
X = input.nextInt();
System.out.println();
System.out.print( "Enter the number of columns you would like in your game grid: " );
Y = input.nextInt(); 
System.out.println(); 

buildGrid(X, Y);  // Calls buildGrid method 

} // Closes main method

public static void buildGrid(int X, int Y) // Method for actually building the grid
{
    int gameGrid [][] = new int [X][Y];      // Array built from user's input for dimensions
    int totalGridSize = X * Y;               // Gets the total grid size
    double cookieTotal = totalGridSize * (.2);  // Calculates the 20% of cookies that will be on grid
    int theCookies = (int)(cookieTotal*Math.random())+1; //Assigns the randomly generated number  

    int i, j, k = 0;                         // Initialize loop counters
    for (i = 0; i < X; i++)
        {
            for (j = 0; j < Y; j++)
                {
                    gameGrid[X][Y] = k;
                    k++; 
                    System.out.print("." + ("O" * theCookies)); // I know I can't do this, but how to fix?
                }
        }
 } // Closes buildGrid method
} // Closes PacManGame class

Answer 1

交换数组坐标会更好，因此首先Y，然后是X。您可以在数组1中保留cookie，其余为0。要放置cookieTotal个Cookie，您可以使用以下代码：

new Random().ints(0, totalGridSize).distinct().limit(cookieTotal)
        .forEach(pos -> gameGrid[pos/X][pos%X] = 1);

我们在此处生成从0到totalGridSize-1的随机数，并使cookieTotal与其不同。之后，我们将这些数字转换为坐标并设置相应的数组元素。

要打印游戏区域，您需要将0翻译为'.'，将1翻译为"O"：

for (int[] row : gameGrid)
    System.out.println(IntStream.of(row).mapToObj(val -> val == 1 ? "O" : ".")
            .collect(Collectors.joining()));

这是buildGrid的完整正文：

int gameGrid[][] = new int[Y][X];
int totalGridSize = X * Y;
int cookieTotal = totalGridSize / 5;
new Random().ints(0, totalGridSize).distinct().limit(cookieTotal)
        .forEach(pos -> gameGrid[pos / X][pos % X] = 1);
for (int[] row : gameGrid)
    System.out.println(IntStream.of(row).mapToObj(val -> val == 1 ? "O" : ".")
            .collect(Collectors.joining()));

如何使用随机分布的符号填充数组？

1 个答案: