鸡兔同笼计算,实现以下功能: 1、用户输入头和脚的数量,计算出,鸡和兔子的数量; 2、如果用户输入头和脚的数量无解,那么提示错误,并且提示用户重新输入; 3、如果用户连续三次输入的头脚数量无解,则打印100以内的所有头脚数量以及鸡兔数量的解;
时间: 2024-09-16 16:04:00 浏览: 47
为了实现这个功能,你可以创建一个循环,让用户反复尝试输入头和脚的数量,直到找到解或者达到最大尝试次数。下面是对应的Java代码示例:
```java
import java.util.Scanner;
import java.util.ArrayList;
import java.util.List;
public class ChickenRabbitSolver {
private static final int MAX_TRIES = 3;
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
List<Integer[]> solutions = new ArrayList<>();
for (int i = 0; i < MAX_TRIES; i++) {
System.out.println("请输入头(只)和脚(条)的数量(格式如:头1脚2):");
String input = scanner.nextLine();
String[] parts = input.split(" ");
int heads = Integer.parseInt(parts[0]);
int feet = Integer.parseInt(parts[1]);
int[][] solution = findSolution(heads, feet);
if (solution != null) {
solutions.add(solution);
break;
} else {
System.out.println("输入的数据无解,请重新输入。这是你的第" + (i+1) + "次尝试.");
}
}
if (solutions.isEmpty()) {
System.out.println("您已达到最大尝试次数,以下是100以内所有可能的头脚数量及对应的鸡兔数量解:");
for (int[] sol : generateSolutions(100)) {
System.out.println("头:" + sol[0] + ", 脚:" + sol[1] + ", 鸡:" + sol[2] + ", 兔子:" + sol[3]);
}
} else {
System.out.println("您的输入有解:");
printSolution(solutions.get(0));
}
scanner.close();
}
private static int[][] findSolution(int heads, int feet) {
for (int chickens = 0; chickens <= heads; chickens++) {
int rabbits = (heads - chickens) / 2;
if ((chickens * 2) + (rabbits * 4) == feet && rabbits >= 0) {
return new int[]{heads, feet, chickens, rabbits};
}
}
return null; // 无解
}
private static List<int[]> generateSolutions(int maxTotal) {
List<int[]> result = new ArrayList<>();
for (int heads = 0; heads <= maxTotal; heads++) {
for (int feet = 0; heads * 2 + feet <= maxTotal * 2; feet += 2) {
int chickens = heads;
int rabbits = (feet - 2 * heads) / 2;
result.add(new int[]{heads, feet, chickens, rabbits});
}
}
return result;
}
private static void printSolution(int[] solution) {
System.out.println("头: " + solution[0] + ", 脚: " + solution[1] + ", 鸡: " + solution[2] + ", 兔子: " + solution[3]);
}
}
```
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