Question

我正在制作一个可以创造10个足球运动的程序。我有三个随机对象。一个人随机播放并播放。第二个拉随机数获得正增益，第三个随机抽取随机数，当四分卫被解雇时。

我遇到的问题是我希望能够在循环结束后计算出驱动器的总码数（正码 - 负码）并且我无法正确计算出数字。有任何想法吗？

public void callPlays（）{

Random random = new Random();       //plays and players
Random yardsGained = new Random();  //positive plays
Random yardsLost = new Random();    //negative plays

int totalYards=0;
int numberOfYards = 0;
int lossOfYards = 0;

System.out.println("Redskins begin drive on their own 20 yard line");

for(int i=0;i<10;i++) 
{

    numberOfYards = yardsGained.nextInt(16);
    lossOfYards = yardsLost.nextInt(16);


    String[] passCatchers = new String[6];

    passCatchers[0] = "DeSean Jackson";
    passCatchers[1] = "Pierre Garcon";
    passCatchers[2] = "Jamison Crowder";
    passCatchers[3] = "Jordan Reed";
    passCatchers[4] = "Matt Jones";
    passCatchers[5] = "Chris Thompson";

    int passCatcher = random.nextInt(passCatchers.length); 

    String[] backs = {"Matt Jones", "Chris Thompson"};

    int runningBack = random.nextInt(backs.length);

    String[] plays = new String[7];

    plays[0] = "Pass complete to " + passCatchers[passCatcher]  
    + " for " + numberOfYards + " yards.";

    plays[1] = "Handoff to " + backs[runningBack] + " along the left   
    edge for " + numberOfYards + " yards.";

    plays[2] = "Handoff to " + backs[runningBack] + " up the middle for 
    " + numberOfYards + " yards.";

    plays[3] = "Handoff to " + backs[runningBack] + " along the right  
    edge for " + numberOfYards + " yards.";

    plays[4] = "Screen pass to " + passCatchers[passCatcher] + " for "  
    + numberOfYards + " yards";

    plays[5] = "Kirk Cousins scrambles for " + numberOfYards + " 
    yards";

    plays[6] = "Kirk Cousins sacked for " + lossOfYards + " yards.";

    int select = random.nextInt(plays.length); 
    System.out.println(plays[select]);


}

totalYards = numberOfYards - lossOfYards;  //does not add up correctly
System.out.println("10 play drive. " + totalYards + " yards.")

Answer 1

在您的情况下，您似乎只获得了上次迭代的yardsGained和yardsLost值。您需要在每次迭代中添加/减少这些。试试以下。

public void callPlays() {


 Random random = new Random();       //plays and players
 Random yardsGained = new Random();  //positive plays
 Random yardsLost = new Random();    //negative plays

 int totalYards=0;
 int numberOfYards = 0;
 int lossOfYards = 0;

 System.out.println("Redskins begin drive on their own 20 yard line");

 for(int i=0;i<10;i++) 
 {

    numberOfYards = yardsGained.nextInt(16);
    lossOfYards = yardsLost.nextInt(16);


    String[] passCatchers = new String[6];

    passCatchers[0] = "DeSean Jackson";
    passCatchers[1] = "Pierre Garcon";
    passCatchers[2] = "Jamison Crowder";
    passCatchers[3] = "Jordan Reed";
    passCatchers[4] = "Matt Jones";
    passCatchers[5] = "Chris Thompson";

    int passCatcher = random.nextInt(passCatchers.length); 

    String[] backs = {"Matt Jones", "Chris Thompson"};

    int runningBack = random.nextInt(backs.length);

    String[] plays = new String[7];

    plays[0] = "Pass complete to " + passCatchers[passCatcher]  
    + " for " + numberOfYards + " yards.";

    plays[1] = "Handoff to " + backs[runningBack] + " along the left   
    edge for " + numberOfYards + " yards.";

    plays[2] = "Handoff to " + backs[runningBack] + " up the middle for 
    " + numberOfYards + " yards.";

    plays[3] = "Handoff to " + backs[runningBack] + " along the right  
    edge for " + numberOfYards + " yards.";

    plays[4] = "Screen pass to " + passCatchers[passCatcher] + " for "  
    + numberOfYards + " yards";

    plays[5] = "Kirk Cousins scrambles for " + numberOfYards + " 
    yards";

    plays[6] = "Kirk Cousins sacked for " + lossOfYards + " yards.";

    int select = random.nextInt(plays.length); 
    System.out.println(plays[select]);

    totalYards += (numberOfYards - lossOfYards);
 }

 System.out.println("10 play drive. " + totalYards + " yards.")

如何在＆＃39; for循环中获得一系列随机数的正确总和。

1 个答案: