1def cubic_yards_to_tons(cubic_yards, material_type):
2    # 材料密度（吨每立方码）
3    densities = {
4        'soil': 1.4,
5        'gravel': 1.5,
6        'sand': 1.3,
7        'concrete': 2.0,
8        'asphalt': 1.9,
9        'limestone': 1.6,
10        'granite': 1.7,
11        'clay': 1.1,
12        'mulch': 0.5,
13        'wood': 0.7
14    }
15    
16    if material_type not in densities:
17        raise ValueError(f"未知的材料类型: {material_type}")
18    
19    return round(cubic_yards * densities[material_type], 2)
20
21# 示例用法
22material = 'gravel'
23volume = 15
24weight = cubic_yards_to_tons(volume, material)
25print(f"{volume} 立方码的 {material} 大约重 {weight} 吨")
26

1function cubicYardsToTons(cubicYards, materialType) {
2  const densities = {
3    soil: 1.4,
4    gravel: 1.5,
5    sand: 1.3,
6    concrete: 2.0,
7    asphalt: 1.9,
8    limestone: 1.6,
9    granite: 1.7,
10    clay: 1.1,
11    mulch: 0.5,
12    wood: 0.7
13  };
14  
15  if (!densities[materialType]) {
16    throw new Error(`未知的材料类型: ${materialType}`);
17  }
18  
19  return parseFloat((cubicYards * densities[materialType]).toFixed(2));
20}
21
22// 示例用法
23const volume = 10;
24const material = 'concrete';
25const weight = cubicYardsToTons(volume, material);
26console.log(`${volume} 立方码的 ${material} 重 ${weight} 吨`);
27

1import java.util.HashMap;
2import java.util.Map;
3
4public class VolumeConverter {
5    private static final Map<String, Double> MATERIAL_DENSITIES = new HashMap<>();
6    
7    static {
8        MATERIAL_DENSITIES.put("soil", 1.4);
9        MATERIAL_DENSITIES.put("gravel", 1.5);
10        MATERIAL_DENSITIES.put("sand", 1.3);
11        MATERIAL_DENSITIES.put("concrete", 2.0);
12        MATERIAL_DENSITIES.put("asphalt", 1.9);
13        MATERIAL_DENSITIES.put("limestone", 1.6);
14        MATERIAL_DENSITIES.put("granite", 1.7);
15        MATERIAL_DENSITIES.put("clay", 1.1);
16        MATERIAL_DENSITIES.put("mulch", 0.5);
17        MATERIAL_DENSITIES.put("wood", 0.7);
18    }
19    
20    public static double cubicYardsToTons(double cubicYards, String materialType) {
21        if (!MATERIAL_DENSITIES.containsKey(materialType)) {
22            throw new IllegalArgumentException("未知的材料类型: " + materialType);
23        }
24        
25        double density = MATERIAL_DENSITIES.get(materialType);
26        return Math.round(cubicYards * density * 100.0) / 100.0;
27    }
28    
29    public static double tonsToCubicYards(double tons, String materialType) {
30        if (!MATERIAL_DENSITIES.containsKey(materialType)) {
31            throw new IllegalArgumentException("未知的材料类型: " + materialType);
32        }
33        
34        double density = MATERIAL_DENSITIES.get(materialType);
35        return Math.round(tons / density * 100.0) / 100.0;
36    }
37    
38    public static void main(String[] args) {
39        double cubicYards = 5.0;
40        String material = "gravel";
41        double tons = cubicYardsToTons(cubicYards, material);
42        
43        System.out.printf("%.2f 立方码的 %s 重 %.2f 吨%n", 
44                          cubicYards, material, tons);
45    }
46}
47

1<?php
2function cubicYardsToTons($cubicYards, $materialType) {
3    $densities = [
4        'soil' => 1.4,
5        'gravel' => 1.5,
6        'sand' => 1.3,
7        'concrete' => 2.0,
8        'asphalt' => 1.9,
9        'limestone' => 1.6,
10        'granite' => 1.7,
11        'clay' => 1.1,
12        'mulch' => 0.5,
13        'wood' => 0.7
14    ];
15    
16    if (!isset($densities[$materialType])) {
17        throw new Exception("未知的材料类型: $materialType");
18    }
19    
20    return round($cubicYards * $densities[$materialType], 2);
21}
22
23// 示例用法
24$volume = 12;
25$material = 'sand';
26$weight = cubicYardsToTons($volume, $material);
27echo "$volume 立方码的 $material 重 $weight 吨";
28?>
29

1using System;
2using System.Collections.Generic;
3
4public class VolumeConverter
5{
6    private static readonly Dictionary<string, double> MaterialDensities = new Dictionary<string, double>
7    {
8        { "soil", 1.4 },
9        { "gravel", 1.5 },
10        { "sand", 1.3 },
11        { "concrete", 2.0 },
12        { "asphalt", 1.9 },
13        { "limestone", 1.6 },
14        { "granite", 1.7 },
15        { "clay", 1.1 },
16        { "mulch", 0.5 },
17        { "wood", 0.7 }
18    };
19    
20    public static double CubicYardsToTons(double cubicYards, string materialType)
21    {
22        if (!MaterialDensities.ContainsKey(materialType))
23        {
24            throw new ArgumentException($"未知的材料类型: {materialType}");
25        }
26        
27        double density = MaterialDensities[materialType];
28        return Math.Round(cubicYards * density, 2);
29    }
30    
31    public static void Main()
32    {
33        double cubicYards = 8.0;
34        string material = "limestone";
35        double tons = CubicYardsToTons(cubicYards, material);
36        
37        Console.WriteLine($"{cubicYards} 立方码的 {material} 重 {tons} 吨");
38    }
39}
40