这是我的代码:
public static void main(String[] args) {
int lotteryNumbers[] = new int[5];
int playersNumbers[] = new int[5];
int winNum = 0;
Scanner in = new Scanner(System.in);
Random r = new Random();
// array med 5 heltal
//skapa en for loop som fyller upp arrrayen
//med slumpade tal från klassen Random
for (int i = 0; i < lotteryNumbers.length; i++) {
lotteryNumbers[i] = 0 + r.nextInt(9);
System.out.print(lotteryNumbers[i] + "\t");
}
System.out.println();
for (int i = 0; i < playersNumbers.length; i++) {
//System.out.println("Var god ange ett nummer mellan 0-9: ");
//playersNumbers[i]=in.nextInt();
playersNumbers[i] = 0 + r.nextInt(9);
}
for (int i = 0; i < playersNumbers.length; i++) {
System.out.print(playersNumbers[i] + "\t");
}
System.out.println();
if (lotteryNumbers[0]==playersNumbers[0])
winNum++;
if (lotteryNumbers[1]==playersNumbers[1])
winNum++;
if (lotteryNumbers[2]==playersNumbers[2])
winNum++;
if (lotteryNumbers[3]==playersNumbers[3])
winNum++;
if (lotteryNumbers[4]==playersNumbers[4])
winNum++;
System.out.println("You have " + winNum + " winning numbers");
}
}
我需要将数字索引与索引进行比较。如您所见，我有 5 个 if 语句。我想知道我是否可以用循环代替？
我已经尝试这样做了:
for (int i = 0; i < lotteryNumbers.length; i++) {
for (int j = 0; j < playersNumbers.length; j++) {
if (lotteryNumbers[i] == playersNumbers[j]) {
winNum++;
}
}
}
但这会将每个索引与每个索引进行比较，而不仅仅是索引与索引。我想知道如何编写用于比较索引与索引的循环？
最佳答案
只使用一个循环。这样可以在两个数组中使用相同的索引。
for (int i = 0; i < lotteryNumbers.length; i++) {
if (lotteryNumbers[i] == playersNumbers[i]) {
winNum++;
}
}
关于Java比较数组元素索引与索引，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28472061/