有什么办法能够快速交换两个文件的图标吗？或者用C语言代码实现

可以使用 C++ 代码实现快速交换两个文件的图标。以下是实现代码：

#include <Windows.h>
#include <Shlwapi.h>
#pragma comment(lib, "Shlwapi.lib")

int main(int argc, char* argv[])
{
    if (argc != 3)
    {
        printf("Usage: SwapFileIcon.exe file1 file2\n");
        return 1;
    }

    TCHAR szIconPath1[MAX_PATH], szIconPath2[MAX_PATH];
    if (!ExtractIconExA(argv[1], -1, NULL, NULL, 0) || !ExtractIconExA(argv[2], -1, NULL, NULL, 0))
    {
        printf("Invalid file path.\n");
        return 1;
    }

    SHFILEINFOA sfi1 = { 0 }, sfi2 = { 0 };
    DWORD_PTR dwResult1 = SHGetFileInfoA(argv[1], FILE_ATTRIBUTE_NORMAL, &sfi1, sizeof(sfi1), SHGFI_ICONLOCATION),
        dwResult2 = SHGetFileInfoA(argv[2], FILE_ATTRIBUTE_NORMAL, &sfi2, sizeof(sfi2), SHGFI_ICONLOCATION);
    if (!dwResult1 || !dwResult2)
    {
        printf("Failed to get file information.\n");
        return 1;
    }

    StrCpyA(szIconPath1, sfi1.szDisplayName);
    StrCpyA(szIconPath2, sfi2.szDisplayName);

    HKEY hKey1, hKey2;
    if (RegOpenKeyExA(HKEY_CLASSES_ROOT, szIconPath1, 0, KEY_ALL_ACCESS, &hKey1) != ERROR_SUCCESS
        || RegOpenKeyExA(HKEY_CLASSES_ROOT, szIconPath2, 0, KEY_ALL_ACCESS, &hKey2) != ERROR_SUCCESS)
    {
        printf("Failed to open registry key.\n");
        return 1;
    }

    TCHAR szDefaultIcon1[MAX_PATH], szDefaultIcon2[MAX_PATH];
    DWORD dwSize1 = sizeof(szDefaultIcon1), dwSize2 = sizeof(szDefaultIcon2);
    if (RegQueryValueExA(hKey1, "DefaultIcon", 0, NULL, (LPBYTE)szDefaultIcon1, &dwSize1) != ERROR_SUCCESS
        || RegQueryValueExA(hKey2, "DefaultIcon", 0, NULL, (LPBYTE)szDefaultIcon2, &dwSize2) != ERROR_SUCCESS)
    {
        printf("Failed to get default icon path.\n");
        RegCloseKey(hKey1);
        RegCloseKey(hKey2);
        return 1;
    }

    if (RegSetValueExA(hKey1, "DefaultIcon", 0, REG_SZ, (LPBYTE)szDefaultIcon2, dwSize2) != ERROR_SUCCESS
        || RegSetValueExA(hKey2, "DefaultIcon", 0, REG_SZ, (LPBYTE)szDefaultIcon1, dwSize1) != ERROR_SUCCESS)
    {
        printf("Failed to swap icons.\n");
        RegCloseKey(hKey1);
        RegCloseKey(hKey2);
        return 1;
    }

    printf("Icons have been swapped successfully.\n");

    RegCloseKey(hKey1);
    RegCloseKey(hKey2);

    return 0;
}

此代码基于 Windows 平台，并使用了 Windows API 和 Shlwapi 库，可以通过交换两个文件注册表中的 "DefaultIcon" 值来交换两个文件的图标。

编译此代码并将其命名为 "SwapFileIcon.exe"，然后在命令行中执行以下命令来交换两个文件的图标：

SwapFileIcon.exe file1 file2

其中 "file1" 和 "file2" 是要交换图标的文件路径。