for (Card card : cards) {
时间: 2023-11-27 18:03:17 浏览: 51
// code for each card in the cards list
}
This is a for-each loop that iterates over each element (Card object) in the cards list. The loop variable "card" is assigned to each element in turn, and the code inside the loop is executed for each card. This is a shorthand way of writing a traditional for loop using an index variable.
相关问题
2406:Card Stacking c++
Card stacking in C++ refers to a technique used in programming to manipulate or organize data using arrays or other data structures. It involves stacking or arranging elements of a collection, such as cards in a deck, in a specific order for easy access and manipulation.
In C++, you can implement card stacking using arrays or vectors. Here's a simple example of card stacking using an array:
```cpp
#include <iostream>
const int MAX_CARDS = 52;
// Function to stack the cards
void stackCards(int cards[]) {
// Stacking logic goes here
// You can manipulate the array as per your requirements
// For example, you can arrange the cards in a specific order
}
int main() {
int cards[MAX_CARDS];
// Populate the cards array with some values
// Stack the cards
stackCards(cards);
// Perform any further operations on the stacked cards
return 0;
}
```
In this example, you can define an array `cards` to store the card values. The `stackCards` function can then be used to manipulate the array as per your requirements. You can arrange the cards in a specific order or perform any other operations on the stacked cards.
Remember to adapt this example according to your specific needs and algorithms.
String str = "Card 0,Card 1"; String[] cards = str.split(","); for (String card : cards) { String[] parts = card.split("\\s+"); for (String part : parts) { if (part.matches("\\d+")) { System.out.println(part); } } } 用最简单的代码
您可以将上述代码简化如下:
```
String str = "Card 0,Card 1";
String[] parts = str.replaceAll("\\D+", " ").trim().split(" ");
for (String part : parts) {
if (!part.isEmpty()) {
System.out.println(part);
}
}
```
输出结果与之前相同:
```
0
1
```
在上述代码中,我们首先使用 replaceAll() 方法将非数字字符替换为空格,然后使用 trim() 方法去除字符串两端的空格,最后使用 split() 方法将字符串分割成字符串数组。对于每个字符串数组元素,我们使用 isEmpty() 方法判断其是否为空字符串,然后直接输出。需要注意的是,正则表达式中的双反斜杠是用来转义反斜杠的。