研究文学的人通常需要统计一篇文章【用英文写】中某个人名、地名或形容词出现的次数和位置，请帮我写一个统计系统，完成以下功能，其中文章存放在一个名为wen.txt的文件中，要查找的人名，地名和形容词一次性输入在另一个名为cha.txt的文本文件中，要求系统读取wen.txt和cha.txt这两个文件并运行一次，全部统计完成，并把结果存放在文件result.txt中，并且统计所有查找对象出现的概率 使用基于c语言的代码

好的，我可以为你编写一个基于C语言的统计系统。以下是代码：

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

#define MAX_WORD_LEN 50
#define MAX_FILE_LEN 100000

typedef struct {
    char word[MAX_WORD_LEN];
    int count;
    int *positions;
    int pos_count;
    double probability;
} Word;

typedef struct {
    Word *words;
    int count;
} WordList;

int count_words(char *str, char *word) {
    int count = 0;
    char *pos = str;
    while ((pos = strstr(pos, word)) != NULL) {
        count++;
        pos += strlen(word);
    }
    return count;
}

WordList *load_word_list(char *filename) {
    FILE *fp = fopen(filename, "r");
    if (fp == NULL) {
        printf("Failed to open file: %s\n", filename);
        exit(1);
    }

    char buf[MAX_WORD_LEN];
    WordList *word_list = (WordList *)malloc(sizeof(WordList));
    word_list->words = (Word *)malloc(sizeof(Word));
    word_list->count = 0;

    while (fgets(buf, MAX_WORD_LEN, fp) != NULL) {
        buf[strcspn(buf, "\r\n")] = '\0'; // remove newline characters
        word_list->words = (Word *)realloc(word_list->words, (word_list->count + 1) * sizeof(Word));
        strcpy(word_list->words[word_list->count].word, buf);
        word_list->words[word_list->count].count = 0;
        word_list->words[word_list->count].positions = NULL;
        word_list->words[word_list->count].pos_count = 0;
        word_list->words[word_list->count].probability = 0.0;

        word_list->count++;
    }

    fclose(fp);
    return word_list;
}

void count_words_in_file(char *filename, WordList *word_list) {
    FILE *fp = fopen(filename, "r");
    if (fp == NULL) {
        printf("Failed to open file: %s\n", filename);
        exit(1);
    }

    char *file_contents = (char *)malloc(MAX_FILE_LEN);
    fread(file_contents, 1, MAX_FILE_LEN, fp);
    fclose(fp);

    // count occurrences of each word in the file
    char *pos = file_contents;
    while (*pos != '\0') {
        for (int i = 0; i < word_list->count; i++) {
            int count = count_words(pos, word_list->words[i].word);
            if (count > 0) {
                word_list->words[i].count += count;
                word_list->words[i].positions = (int *)realloc(word_list->words[i].positions, (word_list->words[i].pos_count + count) * sizeof(int));
                char *word_pos = strstr(pos, word_list->words[i].word);
                for (int j = 0; j < count; j++) {
                    word_list->words[i].positions[word_list->words[i].pos_count] = word_pos - file_contents;
                    word_list->words[i].pos_count++;
                    word_pos += strlen(word_list->words[i].word);
                }
            }
        }
        pos++;
    }

    free(file_contents);
}

void calculate_probabilities(WordList *word_list, int total_words) {
    for (int i = 0; i < word_list->count; i++) {
        word_list->words[i].probability = (double)word_list->words[i].count / total_words;
    }
}

void write_results_to_file(char *filename, WordList *word_list, int total_words) {
    FILE *fp = fopen(filename, "w");
    if (fp == NULL) {
        printf("Failed to open file: %s\n", filename);
        exit(1);
    }

    for (int i = 0; i < word_list->count; i++) {
        fprintf(fp, "%s:\n", word_list->words[i].word);
        fprintf(fp, "\tCount: %d\n", word_list->words[i].count);
        fprintf(fp, "\tPositions: ");
        for (int j = 0; j < word_list->words[i].pos_count; j++) {
            fprintf(fp, "%d", word_list->words[i].positions[j]);
            if (j < word_list->words[i].pos_count - 1) {
                fprintf(fp, ", ");
            }
        }
        fprintf(fp, "\n");
        fprintf(fp, "\tProbability: %.2f%%\n", word_list->words[i].probability * 100);
    }

    fprintf(fp, "Total words: %d\n", total_words);

    fclose(fp);
}

int main() {
    WordList *word_list = load_word_list("cha.txt");
    count_words_in_file("wen.txt", word_list);
    int total_words = 0;
    for (int i = 0; i < word_list->count; i++) {
        total_words += word_list->words[i].count;
    }
    calculate_probabilities(word_list, total_words);
    write_results_to_file("result.txt", word_list, total_words);
    printf("Done!\n");
    return 0;
}

这个程序定义了一个 `Word` 结构体，用于存储一个单词的信息，包括单词本身、出现次数、出现位置等。`WordList` 结构体则用于存储所有要查找的单词，包括它们的出现次数和位置。程序从两个文件中读取要查找的单词和要搜索的文章，然后统计所有单词在文章中的出现次数和位置，并计算每个单词出现的概率，最后将结果写入到一个名为 `result.txt` 的文件中。