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                        <strong>文学研究助手-【C、C++、Java实现】</strong>
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                                <textarea id="$t" style="display:none">## 文学研究助手

统计某篇英语小说中某些特定单词的出现次数和位置。英文小说存放于一文本文件中，由用户输入文本路径，待统计的词汇要一次输入完毕，程序的输出结果是每个词的出现次数和出现位置。以及每个词在文本中总的出现次数。约定小说的词汇一律不跨行。这样，每读入一行，就统计每个词在这行中的出现次数。为了降低难度，如果单词前后紧跟引号、句点、逗号或者其他符号，那么这个不算单词，只有空格隔开的才算一个完整单词。

### C语言实现

```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_WORD_LENGTH 50
#define MAX_WORDS 1000
#define MAX_LINE_LENGTH 1000

int main() {
    char filename[MAX_LINE_LENGTH];
    char words[MAX_WORDS][MAX_WORD_LENGTH];
    char line[MAX_LINE_LENGTH];
    int word_counts[MAX_WORDS] = {0};
    int total_word_count = 0;
    int num_words = 0;

    // 获取要统计的文本文件的路径
    printf("输入待统计的文本的路径: ");
    scanf("%s", filename);

    // 获取要统计的单词
    printf("输入待统计的单词，以空格隔开，以 end 作为结束标志: ");
    scanf("%s", words[num_words]);
    while (strcmp(words[num_words], "end") != 0 && num_words < MAX_WORDS) {
        num_words++;
        scanf("%s", words[num_words]);
    }

    // 打开文本文件并分析统计每一行
    FILE* file = fopen(filename, "r");
    if (file == NULL) {
        printf("文件打开失败!\n");
        exit(1);
    }
    int line_number = 0;
    while (fgets(line, MAX_LINE_LENGTH, file) != NULL) {
        line_number++;

        char* token = strtok(line, " \n");
        while (token != NULL) {
            // 检查该词是否与我们待统计的词汇的任意一个词相匹配
            for (int i = 0; i < num_words; i++) {
                if (strcmp(token, words[i]) == 0) {
                    word_counts[i]++;
                    printf("单词 \"%s\" 出现在第 %d 行, 第 %ld 列\n", words[i], line_number, token - line + 1);
                    total_word_count++;
                }
            }
            token = strtok(NULL, " \n");
        }
    }
    fclose(file);

    // 打印单词出现的次数
    printf("\n待统计的各个单词出现的次数:\n");
    for (int i = 0; i < num_words; i++) {
        printf("\"%s\": %d 次\n", words[i], word_counts[i]);
    }
    printf("待统计的单词出现的总次数: %d\n", total_word_count);

    return 0;
}

```

运行结果如下：
![image20230402131437215.png](https://upload.liuleinet.top/articles/uid-1c7a52d281725c4f9bf423e3d34656d8f.png)

### C++实现

```c++
#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

const int MAX_WORD_LENGTH = 50;
const int MAX_WORDS = 1000;
const int MAX_LINE_LENGTH = 1000;

int main() {
    char filename[MAX_LINE_LENGTH];
    char words[MAX_WORDS][MAX_WORD_LENGTH];
    char line[MAX_LINE_LENGTH];
    int word_counts[MAX_WORDS] = {0};
    int total_word_count = 0;
    int num_words = 0;

    // 获取要统计的文本文件的路径
    cout << "输入待统计的文本的路径: ";
    cin >> filename;

    // 获取要统计的单词
    cout << "输入待统计的单词，以空格隔开，以 end 作为结束标志: ";
    cin >> words[num_words];
    while (strcmp(words[num_words], "end") != 0 && num_words < MAX_WORDS) {
        num_words++;
        cin >> words[num_words];
    }

    // 打开文本文件并分析统计每一行
    ifstream file(filename);
    if (!file.is_open()) {
        cout << "文件打开失败!" << endl;
        exit(1);
    }
    int line_number = 0;
    while (file.getline(line, MAX_LINE_LENGTH)) {
        line_number++;

        char* token = strtok(line, " \n");
        while (token != nullptr) {
            // 检查该词是否与我们待统计的词汇的任意一个词相匹配
            for (int i = 0; i < num_words; i++) {
                if (strcmp(token, words[i]) == 0) {
                    word_counts[i]++;
                    cout << "单词 \"" << words[i] << "\" 出现在第 " << line_number << " 行, 第 " << token - line + 1 << " 列" << endl;
                    total_word_count++;
                }
            }
            token = strtok(nullptr, " \n");
        }
    }
    file.close();

    // 打印单词出现的次数
    cout << "\n待统计的各个单词出现的次数:" << endl;
    for (int i = 0; i < num_words; i++) {
        cout << "\"" << words[i] << "\": " << word_counts[i] << " 次" << endl;
    }
    cout << "待统计的单词出现的总次数: " << total_word_count << endl;

    return 0;
}

```


### Java实现

```java
package top.liuleinet.demo.words;

import java.util.Scanner;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

/**
 * @classname: WordCount
 * @author: lei.liu
 **/
public class WordCount {
    public static void main(String[] args) throws IOException {
        // 读取文本路径
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入英语小说文件路径：");
        String filePath = scanner.nextLine();

        // 读取待统计的词汇
        System.out.print("请输入待统计的词汇，多个词汇用空格分隔：");
        String[] wordsToCount = scanner.nextLine().split(" ");

        // 统计词汇出现次数和位置
        Map<String, Integer> wordCountMap = new HashMap<>();
        Map<String, StringBuilder> wordPositionMap = new HashMap<>();
        int totalWordCount = 0;
        try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
            String line;
            int lineNumber = 1;
            while ((line = reader.readLine()) != null) {
                for (String word : wordsToCount) {
                    String regex = "(?<!\\S)" + word + "(?!\\S)";
                    int wordCount = 0;
                    int index = -1;
                    StringBuilder positions = new StringBuilder();
                    while ((index = line.indexOf(word, index + 1)) != -1) {
                        if ((index == 0 || !Character.isLetterOrDigit(line.charAt(index - 1)))
                                && (index + word.length() == line.length() || !Character.isLetterOrDigit(line.charAt(index + word.length())))) {
                            // 找到单词，并且前后没有字符
                            wordCount++;
                            positions.append(lineNumber).append(":").append(index + 1).append(" ");
                        }
                    }
                    if (wordCount > 0) {
                        wordCountMap.put(word, wordCountMap.getOrDefault(word, 0) + wordCount);
                        wordPositionMap.putIfAbsent(word, new StringBuilder());
                        wordPositionMap.get(word).append(positions);
                    }
                    totalWordCount += wordCount;
                }
                lineNumber++;
            }
        }

        // 输出结果
        for (String word : wordsToCount) {
            System.out.println(word + " 出现次数：" + wordCountMap.getOrDefault(word, 0));
            System.out.println(word + " 出现位置：" + wordPositionMap.getOrDefault(word, new StringBuilder()).toString().trim());
        }
        System.out.println("所有词汇总出现次数：" + totalWordCount);
    }
}

```

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