文件检查功能C ++

Question

我正在尝试编写一个文件检查功能，但似乎有些错误（不是总是这样）。请记住，我刚开始使用C ++。

main（）;

的相关部分

int main() {


string file, pick, first, firstFirst, second, third, fourth, note;

fstream inputFile, outputfile;
bool done = false;


void display(string second);
void copy(string second, string fourth);
void create(string second);
string getFileName(ios_base::openmode mode);
do {
    stringstream choice;

    //Ask for prompt
    cout << "Enter one of the Following:\n\
quit - Quit the program\n\
Copy <f1> to <f2>\n\
display <f1>\n\
create <f1> <word to quit>\n\
Enter Option: ";

    getline(cin, pick);             //insert their response into a string
    choice << pick;                     //copy string to a stringstream
    choice >> firstFirst;       //copy each word to seperate variables

    //cin.clear();

    first.resize(firstFirst.size());
    transform(firstFirst.begin(), firstFirst.end(),       
    first.begin(),::tolower);

    if (first == "display")

    {

        second = getFileName(ios::in);      //file check & get second
        if (second == "bad")
        {
            cout << "That file does not exist";
            break;
        }
        else {
            cout << "Displaying" << second;
            cout << endl << endl;
            display(second);
        }

这是我的getFileName函数（文件检查器）

string getFileName(ios_base::openmode mode)

{
string fileName;
fstream inputFile;

cin >> fileName;            //pull file name string off buffer

if (mode == ios::in)
{
    while (fileName.at(0) == '"')
    {
        fileName.erase(
        remove(fileName.begin(), fileName.end(), '\"'),
        fileName.end()
        );
    }

    inputFile.open(fileName, ios::in);
    {
        if (inputFile.good() != true)
        {
            inputFile.close();
            fileName = "bad";

        }
        else
        {
            inputFile.close();

        }
    }
}

else if (mode == ios::out)
{
    while (fileName.at(0) == '"')
    {
        fileName.erase(
        remove(fileName.begin(), fileName.end(), '\"'),
        fileName.end()
        );
    }

    inputFile.open(fileName, ios::in);
    {
        if (inputFile.good() != true)
        {
            inputFile.close();
            fileName = "bad";
        }
        else
        {
            inputFile.close();

        }
    }
}

else 
{

    fileName = "bad";

}

return fileName;
}

感谢百万提供任何帮助。