Question

我正在尝试使程序提示用户输入文件名，然后提示用户输入要删除的单词。有没有没有在main外部进行任何功能的方法？（提前致谢！）到目前为止，这是我的代码：

ofstream outFile;
string in;
char in2[800];
char fileName = ' ';
while (in != "XXXX") {
    cout << "What do you want to name the file? Enter a name or enter XXXX to quit.\n";
    cin >> in;

    for (int i = 0; i < in.length(); i++)
    {
        fileName += in[i];
    }
    outFile.open(in + ".txt");
    if (outFile.fail())
    {
        outFile << "Can't do it.";
    }
    else
    {
        cout << "What do you want in it?\n";
        cin >> in2;
        cin.getline(in2, sizeof(in2));
        outFile << in2;
    }
    outFile.close();
    ifstream reader;
    string oneLine;
    reader.open(in + ".txt");
    if (reader.fail())
    {
        cout << "Could not read file.\n";
        return 0;
    }
    else
    {
        reader.clear();
        reader.seekg(60L, ios::beg);
        getline(reader, oneLine);
        cout << "Is there something you'd like to remove from " << in << ".txt?\n";
        cin >> in2;
        ofstream write("tmp.txt");
        while (getline(reader, oneLine)) {
            if (oneLine != in2)
                write << oneLine << endl;
        }
        reader.close();
        write.close();
        remove(fileName + ".txt");
        rename("tmp.txt", fileName + ".txt");
        return 0;
    }
    return 0;
}

Answer 1

XXXX

如果输入char fileName = ' ';，则循环不会退出。它将尝试处理其余代码。

std::string fileName;声明一个字符。您需要一个字符数组。更好的是，将其声明为remove(fileName + ".txt");

remove无法编译，因为std::string是C函数。 C不支持类，也不知道如何处理诸如fileName.c_str()之类的类。您想提供一个C字符串，您可以使用int main() { ofstream outFile; string fileName; string text; for(;;) { cout << "What do you want to name the file?\n"; cout << "Enter a name or enter 999 to quit.\n"; cin >> fileName; if(fileName == "999") break; fileName += ".txt"; outFile.open(fileName); if(outFile.fail()) { cout << "Can't do it."; continue; } else { for(;;) { cout << "What do you want in it?\n"; cout << "Enter a name or enter 999 to stop.\n"; cin >> text; if(text == "999") break; outFile << text << endl; } } outFile.close(); ifstream reader; reader.open(fileName); if(reader.fail()) { cout << "Could not read file.\n"; } else { cout << "Is there something you'd like to remove from " << fileName << "?\n"; cin >> text; string oneLine; ofstream write("tmp.txt"); while(getline(reader, oneLine)) { if(oneLine != text) write << oneLine << endl; } reader.close(); write.close(); remove(fileName.c_str()); rename("tmp.txt", fileName.c_str()); break; } } }来完成，以下是一些建议：

num

文本文件问题（Visual C ++）

1 个答案: