How to retrieve content from an Excel cell using the C language?

In the C language, third-party libraries like libxlsxwriter or LibreOffice Calc can be used to read Excel cell contents. Below is a simple example of using the libxlsxwriter library to read Excel cell contents.

#include <xlsxwriter.h>

int main() {
    lxw_workbook  *workbook  = workbook_new("example.xlsx");
    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
    
    // 写入一些数据到Excel文件
    worksheet_write_string(worksheet, 0, 0, "Hello", NULL);
    worksheet_write_string(worksheet, 0, 1, "World", NULL);
    
    // 读取单元格内容
    lxw_cell *cell = worksheet_find_cell(worksheet, 0, 0);
    
    if (cell) {
        printf("Cell A1 contains: %s\n", cell->string);
    } else {
        printf("Cell A1 is empty\n");
    }
    
    workbook_close(workbook);
    
    return 0;
}

In the example above, a new Excel file was created using the libxlsxwriter library, and the strings “Hello” and “World” were written to it. Next, the worksheet_find_cell function was used to locate the content of a specified cell, and finally the content of that cell was printed.

It is important to note that using a third-party library to read the contents of an Excel file may require installing additional dependencies and linking the corresponding library files during compilation.