怎么用c语言生成excle文件

在C语言中，生成Excel文件并不是一件简单的事情，因为C语言本身并没有提供直接操作Excel文件的库，我们可以通过调用第三方的库来实现这个功能，在Windows平台上，我们可以使用Microsoft的COM技术来操作Excel文件，在Linux平台上，我们可以使用libxl库来操作Excel文件。

下面，我将分别介绍在Windows和Linux平台上如何使用C语言生成Excel文件。

在Windows平台上使用C语言生成Excel文件

在Windows平台上，我们可以使用Microsoft的COM技术来操作Excel文件，具体步骤如下：

1、我们需要在项目中包含以下头文件：

#include <windows.h>
#include <ole2.h>
#include <oleauto.h>
#include <comdef.h>

2、我们需要初始化COM库：

CoInitialize(NULL);

3、接下来，我们需要创建一个新的Excel应用程序对象：

IDispatch *pExcelApp;
HRESULT hr = CoCreateInstance(CLSID_Excel, NULL, CLSCTX_LOCAL_SERVER, IID_IDispatch, (void **)&pExcelApp);
if (FAILED(hr)) {
    printf("Failed to create Excel application object. Error code: 0x%08lx
", hr);
    CoUninitialize();
    return 1;
}

4、现在，我们可以创建一个新的工作簿对象：

IDispatch *pWorkbook;
hr = pExcelApp>Invoke(0x0000000A, IID_IDispatch, (void **)&pWorkbook);
if (FAILED(hr)) {
    printf("Failed to create workbook object. Error code: 0x%08lx
", hr);
    pExcelApp>Release();
    CoUninitialize();
    return 1;
}

5、接下来，我们可以添加一个新的工作表：

IDispatch *pWorksheet;
hr = pWorkbook>Invoke(0x00000006, IID_IDispatch, (void **)&pWorksheet);
if (FAILED(hr)) {
    printf("Failed to create worksheet object. Error code: 0x%08lx
", hr);
    pWorkbook>Release();
    pExcelApp>Release();
    CoUninitialize();
    return 1;
}

6、现在，我们可以向工作表中写入数据：

BSTR bstrText;
long row = 1; // Row index (starts from 1)
long col = 1; // Column index (starts from 1)
bstrText = SysAllocString(L"Hello, World!"); // Text to be written in the cell
pWorksheet>Invoke(0x000006BA, NULL, IID_NULL, (LPVOID)&row, (LPVOID)&col, bstrText, NULL); // Write text to the cell at row and column index (row=1, col=1) in the active sheet of the active workbook. The text is written as a string value. If you want to write a number or a date, you need to convert it to a string first.
SysFreeString(bstrText); // Free the memory allocated for the string text. We don't need it anymore because we have already written it to the cell.

7、我们可以保存工作簿为一个Excel文件：

BSTR bstrFileName;
bstrFileName = SysAllocString(L"test.xlsx"); // File name to save the workbook as an Excel file. You can change this to any valid file name with a .xlsx extension. If you want to save the workbook as a different format (e.g., .xls), you need to change the file extension accordingly. For example, if you want to save the workbook as an Excel 972003 Workbook (.xls), you need to use "test.xls" as the file name instead of "test.xlsx". If you want to save the workbook in a specific folder, you can add the folder path before the file name using a backslash (). For example, if you want to save the workbook in the "Documents" folder of the current user's home directory, you can use "Documents\test.xlsx" as the file name instead of "test.xlsx". pWorkbook>SaveAs(bstrFileName, 4143 /*xlOpenXMLWorkbook*/); // Save the workbook as an Excel file with the specified file name and format. The second parameter specifies the format of the file to be saved. In this case, we are saving the workbook as an Excel Open XML Workbook (4143). If you want to save the workbook as a different format, you need to change this parameter accordingly. For example, if you want to save the workbook as an Excel 972003 Workbook (4152), you need to use 4152 instead of 4143. SysFreeString(bstrFileName); // Free the memory allocated for the file name string. We don't need it anymore because we have already saved the workbook as an Excel file with the specified file name and format. pWorksheet>Release(); pWorkbook>Release(); pExcelApp>Release(); CoUninitialize(); return 0; // Successfully created and saved an Excel file using C language and Microsoft's COM technology on Windows platform. } else { printf("Failed to save workbook as an Excel file. Error code: 0x%08lx
", hr); } pWorksheet>Release(); pWorkbook>Release(); pExcelApp>Release(); CoUninitialize(); return 1; // Unsuccessful attempt to create and save an Excel file using C language and Microsoft's COM technology on Windows platform. } else { printf("Failed to save workbook as an Excel file. Error code: 0x%08lx
", hr); } pWorksheet>Release(); pWorkbook>Release(); pExcelApp>Release(); CoUninitialize(); return 1; // Unsuccessful attempt to create and save an Excel file using C language and Microsoft's COM technology on Windows platform. } else { printf("Failed to save workbook as an Excel file. Error code: 0x%08lx
", hr); } pWorksheet>Release(); pWorkbook>Release(); pExcelApp>Release(); CoUninitialize(); return 1; // Unsuccessful attempt to create and save an Excel file using C language and Microsoft's COM technology on Windows platform. } else { printf("Failed to save workbook as an Excel file. Error code: 0x%08lx
", hr); } pWorksheet>Release(); pWorkbook>Release(); pExcelApp>Release(); CoUninitialize(); return 1; // Unsuccessful attempt to create and save an