1/**
2 * 根据物种、年龄和高度估算树木的叶子数量。
3 * @param {string} species - 树种（橡树、枫树、松树等）
4 * @param {number} age - 树木的年龄（以年为单位）
5 * @param {number} height - 树木的高度（以米为单位）
6 * @returns {number} 估算的叶子数量
7 */
8function estimateLeafCount(species, age, height) {
9  // 物种因素对象
10  const speciesFactors = {
11    'oak': 4.5,
12    'maple': 5.2,
13    'pine': 3.0,
14    'birch': 4.0,
15    'spruce': 2.8,
16    'willow': 3.7,
17    'ash': 4.2,
18    'beech': 4.8,
19    'cedar': 2.5,
20    'cypress': 2.3
21  };
22  
23  // 获取物种因素，如果未找到物种则默认为橡树
24  const speciesFactor = speciesFactors[species.toLowerCase()] || 4.5;
25  
26  // 计算年龄因素，使用对数函数
27  const ageFactor = Math.log(age + 1) * 2.5;
28  
29  // 计算高度因素
30  const heightFactor = Math.pow(height, 1.5);
31  
32  // 使用缩放因子计算叶子计数
33  const leafCount = speciesFactor * ageFactor * heightFactor * 100;
34  
35  return Math.round(leafCount);
36}
37
38// 示例用法
39const treeSpecies = 'maple';
40const treeAge = 25; // 年
41const treeHeight = 12; // 米
42
43const estimatedLeaves = estimateLeafCount(treeSpecies, treeAge, treeHeight);
44console.log(`一棵${treeAge}年大的${treeSpecies}树，高${treeHeight}米，大约有${estimatedLeaves.toLocaleString()}片叶子。`);
45

1' Excel函数用于叶子计数估算
2Function EstimateLeafCount(species As String, age As Double, height As Double) As Long
3    Dim speciesFactor As Double
4    Dim ageFactor As Double
5    Dim heightFactor As Double
6    
7    ' 确定物种因素
8    Select Case LCase(species)
9        Case "oak"
10            speciesFactor = 4.5
11        Case "maple"
12            speciesFactor = 5.2
13        Case "pine"
14            speciesFactor = 3
15        Case "birch"
16            speciesFactor = 4
17        Case "spruce"
18            speciesFactor = 2.8
19        Case "willow"
20            speciesFactor = 3.7
21        Case "ash"
22            speciesFactor = 4.2
23        Case "beech"
24            speciesFactor = 4.8
25        Case "cedar"
26            speciesFactor = 2.5
27        Case "cypress"
28            speciesFactor = 2.3
29        Case Else
30            speciesFactor = 4.5 ' 默认为橡树
31    End Select
32    
33    ' 计算年龄因素
34    ageFactor = Application.WorksheetFunction.Ln(age + 1) * 2.5
35    
36    ' 计算高度因素
37    heightFactor = height ^ 1.5
38    
39    ' 使用缩放因子计算叶子计数
40    EstimateLeafCount = Round(speciesFactor * ageFactor * heightFactor * 100)
41End Function
42
43' 在Excel单元格中使用：
44' =EstimateLeafCount("oak", 30, 15)
45

1import java.util.HashMap;
2import java.util.Map;
3
4public class LeafCountEstimator {
5    
6    private static final Map<String, Double> SPECIES_FACTORS = new HashMap<>();
7    
8    static {
9        SPECIES_FACTORS.put("oak", 4.5);
10        SPECIES_FACTORS.put("maple", 5.2);
11        SPECIES_FACTORS.put("pine", 3.0);
12        SPECIES_FACTORS.put("birch", 4.0);
13        SPECIES_FACTORS.put("spruce", 2.8);
14        SPECIES_FACTORS.put("willow", 3.7);
15        SPECIES_FACTORS.put("ash", 4.2);
16        SPECIES_FACTORS.put("beech", 4.8);
17        SPECIES_FACTORS.put("cedar", 2.5);
18        SPECIES_FACTORS.put("cypress", 2.3);
19    }
20    
21    /**
22     * 根据物种、年龄和高度估算树木的叶子数量。
23     * 
24     * @param species 树种（橡树、枫树、松树等）
25     * @param age 树木的年龄（以年为单位）
26     * @param height 树木的高度（以米为单位）
27     * @return 估算的叶子数量
28     */
29    public static long estimateLeafCount(String species, double age, double height) {
30        // 获取物种因素，如果未找到物种则默认为橡树
31        double speciesFactor = SPECIES_FACTORS.getOrDefault(species.toLowerCase(), 4.5);
32        
33        // 计算年龄因素，使用对数函数
34        double ageFactor = Math.log(age + 1) * 2.5;
35        
36        // 计算高度因素
37        double heightFactor = Math.pow(height, 1.5);
38        
39        // 使用缩放因子计算叶子计数
40        double leafCount = speciesFactor * ageFactor * heightFactor * 100;
41        
42        return Math.round(leafCount);
43    }
44    
45    public static void main(String[] args) {
46        String treeSpecies = "beech";
47        double treeAge = 40; // 年
48        double treeHeight = 18; // 米
49        
50        long estimatedLeaves = estimateLeafCount(treeSpecies, treeAge, treeHeight);
51        System.out.printf("一棵%.0f年大的%s树，高%.1fm，大约有%,d片叶子。%n", 
52                          treeAge, treeSpecies, treeHeight, estimatedLeaves);
53    }
54}
55

1#include <stdio.h>
2#include <stdlib.h>
3#include <string.h>
4#include <math.h>
5#include <ctype.h>
6
7// 字符串转换为小写的函数
8void toLowerCase(char *str) {
9    for(int i = 0; str[i]; i++) {
10        str[i] = tolower(str[i]);
11    }
12}
13
14// 估算叶子计数的函数
15long estimateLeafCount(const char *species, double age, double height) {
16    double speciesFactor = 4.5; // 默认为橡树
17    char speciesLower[20];
18    
19    // 复制并转换物种为小写
20    strncpy(speciesLower, species, sizeof(speciesLower) - 1);
21    speciesLower[sizeof(speciesLower) - 1] = '\0'; // 确保空字符终止
22    toLowerCase(speciesLower);
23    
24    // 确定物种因素
25    if (strcmp(speciesLower, "oak") == 0) {
26        speciesFactor = 4.5;
27    } else if (strcmp(speciesLower, "maple") == 0) {
28        speciesFactor = 5.2;
29    } else if (strcmp(speciesLower, "pine") == 0) {
30        speciesFactor = 3.0;
31    } else if (strcmp(speciesLower, "birch") == 0) {
32        speciesFactor = 4.0;
33    } else if (strcmp(speciesLower, "spruce") == 0) {
34        speciesFactor = 2.8;
35    } else if (strcmp(speciesLower, "willow") == 0) {
36        speciesFactor = 3.7;
37    } else if (strcmp(speciesLower, "ash") == 0) {
38        speciesFactor = 4.2;
39    } else if (strcmp(speciesLower, "beech") == 0) {
40        speciesFactor = 4.8;
41    } else if (strcmp(speciesLower, "cedar") == 0) {
42        speciesFactor = 2.5;
43    } else if (strcmp(speciesLower, "cypress") == 0) {
44        speciesFactor = 2.3;
45    }
46    
47    // 计算年龄因素
48    double ageFactor = log(age + 1) * 2.5;
49    
50    // 计算高度因素
51    double heightFactor = pow(height, 1.5);
52    
53    // 使用缩放因子计算叶子计数
54    double leafCount = speciesFactor * ageFactor * heightFactor * 100;
55    
56    return round(leafCount);
57}
58
59int main() {
60    const char *treeSpecies = "pine";
61    double treeAge = 35.0; // 年
62    double treeHeight = 20.0; // 米
63    
64    long estimatedLeaves = estimateLeafCount(treeSpecies, treeAge, treeHeight);
65    
66    printf("一棵%.0f年大的%s树，高%.1fm，大约有%ld片叶子。\n", 
67           treeAge, treeSpecies, treeHeight, estimatedLeaves);
68    
69    return 0;
70}
71