java 将 math.random 值分配给数组
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Assigning math.random value to array
提问by BV45
I have a quick question I am testing out the Math.random functionality. I am trying to assign the result from the (int) (Math.random()*6)+1for each one of the 100 boxes to an array to store the values. But I am getting an error that it is not a statement. Can someone possibly offer some guidance?
我有一个简单的问题，我正在测试 Math.random 功能。我试图将(int) (Math.random()*6)+1100 个盒子中的每一个的结果分配给一个数组来存储值。但我收到一个错误，它不是一个声明。有人可以提供一些指导吗？
public shoes(int[] pairs)
{
System.out.println("We will roll go through the boxes 100 times and store the input for the variables");
for(int i=0; i < 100; i++)
{
//("Random Number ["+ (i+1) + "] : " + (int)(Math.random()*6));
int boxCount[i] = (int) (Math.random()*6) + 1;
}
}
回答by cklab
You have a syntax error. boxCounthas not been instantiated and is not a known type. You need to create the boxCountarray before you attempt to use it. See example below:
您有语法错误。boxCount尚未实例化，也不是已知类型。您需要先创建boxCount数组，然后再尝试使用它。请参阅下面的示例：
public void shoes(int[] pairs)
{
System.out.println("We will roll go through the boxes 100 times and store the input for the variables");
int boxCount[] = new int[100];
for(int i=0; i < boxCount.length; i++)
{
//("Random Number ["+ (i+1) + "] : " + (int)(Math.random()*6));
boxCount[i] = (int) (Math.random()*6) + 1;
}
}
回答by carmenism
int boxCount[i] = (int) (Math.random()*6) + 1;
This line of code looks like you are trying to create an array or something.
这行代码看起来像您正在尝试创建一个数组或其他东西。
You want to create the array boxCountBEFORE your for loop:
您想boxCount在 for 循环之前创建数组：
int boxCount[] = new int[100];
Then you can do this in your loop:
然后你可以在你的循环中做到这一点：
boxCount[i] = (int) (Math.random()*6) + 1;
