csv檔抽籤程式 c語言 簡單化

以下是一个简单的C语言CSV文件抽奖程序的示例，它可以从CSV文件中读取数据并随机选择一个获胜者：

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

#define MAX_LINE_LENGTH 1024
#define MAX_FIELD_LENGTH 128
#define MAX_FIELDS 32

int main(int argc, char *argv[]) {
    if (argc != 2) {
        printf("Usage: %s <csv_file>\n", argv[0]);
        return 1;
    }

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

    char line[MAX_LINE_LENGTH];
    char *fields[MAX_FIELDS];    int num_fields = 0;

    // 读取CSV文件的标题行
    if (fgets(line, MAX_LINE_LENGTH, fp) != NULL) {
        // 去掉行末的换行符
        line[strcspn(line, "\r\n")] = '\0';

        // 解析标题行中的字段
        char *field = strtok(line, ",");
        while (field != NULL && num_fields < MAX_FIELDS) {
            fields[num_fields++] = field;
            field = strtok(NULL, ",");
        }
    }

    // 读取CSV文件中的数据行
    int num_entries = 0;
    char entries[MAX_FIELDS][MAX_FIELD_LENGTH];
    while (fgets(line, MAX_LINE_LENGTH, fp) != NULL && num_entries < MAX_FIELDS) {
        // 去掉行末的换行符
        line[strcspn(line, "\r\n")] = '\0';

        // 解析数据行中的字段
        char *field = strtok(line, ",");
        int i = 0;
        while (field != NULL && i < num_fields) {
            strncpy(entries[num_entries++], field, MAX_FIELD_LENGTH);
            field = strtok(NULL, ",");
            i++;
        }
    }

    // 随机选择一个获胜者
    srand(time(NULL));
    int winner_index = rand() % num_entries;
    char *winner_name = entries[winner_index];

    printf("The winner is: %s\n", winner_name);

    fclose(fp);
    return 0;
}