使用c写一个excel转json代码

以下是一个简单的Excel转换为JSON格式的示例代码。注意，此代码假定Excel文件的第一行是列标题，第二行及以下是数据行。

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

#define MAX_ROWS 1000
#define MAX_COLS 100

char buffer[1024*1024];

int main(int argc, char **argv) {
    if (argc != 3) {
        printf("Usage: excel2json inputfile outputfile\n");
        return 1;
    }

    char *infile = argv[1];
    char *outfile = argv[2];

    FILE *fp = fopen(infile, "r");
    if (!fp) {
        printf("Error: cannot open file %s\n", infile);
        return 1;
    }

    char line[1024];
    int row_count = 0;
    int col_count = 0;
    char *cols[MAX_COLS];

    // Read column headers
    if (fgets(line, sizeof(line), fp)) {
        char *p = strtok(line, "\t\r\n");
        while (p) {
            cols[col_count++] = strdup(p);
            p = strtok(NULL, "\t\r\n");
        }
    }

    // Read data rows
    while (fgets(line, sizeof(line), fp)) {
        if (row_count >= MAX_ROWS) {
            printf("Error: too many rows\n");
            return 1;
        }
        int col_index = 0;
        char *p = strtok(line, "\t\r\n");
        while (p && col_index < col_count) {
            sprintf(buffer, "\"%s\":\"%s\",", cols[col_index++], p);
            strcat(buffer, "\n");
            fwrite(buffer, strlen(buffer), 1, stdout);
            p = strtok(NULL, "\t\r\n");
        }
        row_count++;
    }

    // Write JSON output to file
    FILE *out = fopen(outfile, "w");
    if (!out) {
        printf("Error: cannot create file %s\n", outfile);
        return 1;
    }
    fprintf(out, "{\n");
    for (int i = 0; i < col_count; i++) {
        sprintf(buffer, "\"%s\": [", cols[i]);
        strcat(buffer, "\n");
        fwrite(buffer, strlen(buffer), 1, out);
        fseek(fp, 0, SEEK_SET);
        // Skip header row
        fgets(line, sizeof(line), fp);
        int row_index = 0;
        while (fgets(line, sizeof(line), fp)) {
            char *p = strtok(line, "\t\r\n");
            for (int j = 0; j < i; j++) {
                p = strtok(NULL, "\t\r\n");
            }
            if (row_index > 0) {
                fwrite(",", 1, 1, out);
                fwrite("\n", 1, 1, out);
            }
            if (p && *p) {
                sprintf(buffer, "\"%s\"", p);
                fwrite(buffer, strlen(buffer), 1, out);
            }
            row_index++;
        }
        fwrite("\n", 1, 1, out);
        fwrite("],\n", 2, 2, out);
    }
    fprintf(out, "}\n");

    fclose(fp);
    fclose(out);

    return 0;
}

这个程序将Excel文件转换为JSON格式，并将结果写入输出文件中。要使用该程序，请键入以下命令：

excel2json inputfile.xlsx outputfile.json

其中 `inputfile.xlsx` 是要转换的Excel文件，`outputfile.json` 是输出的JSON文件。