// 界面取得参数

void GetChoice(int &choice , char szFileName[100] ,char szKey[50])

{  

    int cho;

start:

    system("cls");

    cout<<endl<<endl<<endl;

    cout<<" ***********************************************************"<<endl;

    cout<<" *                                 *"<<endl;

    cout<<" *                                 *"<<endl;

    cout<<" *                IDEA算法测试程序                 *"<<endl;

    cout<<" *                                 *"<<endl;

    cout<<" *                                 *"<<endl;

    cout<<" *  请选择以下测试选项:                    *"<<endl;

    cout<<" *                                 *"<<endl;

    cout<<" *           1:  明文加密              *"<<endl;

    cout<<" *                                 *"<<endl;

    cout<<" *           2:  密文解密              *"<<endl;

    cout<<" *                                 *"<<endl;

    cout<<" *           3:  明文加密并生成独立加密文件    *"<<endl;

    cout<<" *                                 *"<<endl;

    cout<<" *           4:  密文解密并生成独立明文文件    *"<<endl;

    cout<<" *                                 *"<<endl;

    cout<<" *           0:  退出程序              *"<<endl;

    cout<<"     请选择一个功能: ";

      cin>>cho;  choice = cho;

    if(choice == 0)  return ;

    if(choice == 1 || choice == 3)   {     cout<<"   \t \t输入待加密的明文文件:"; }

    else if(choice == 2 ||choice == 4)    {      cout<<"    \t\t输入待解密的密文文件:";}

    else

    {

        cout<<"\t \t输入不合法, 请输入合法选项"<<endl;

        system("pause");

        cin.clear();

        goto  start;

    }