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Dmitry Shevchenko's questions

Martin Hope
Dmitry Shevchenko
Asked: 2022-04-12 14:28:47 +0000 UTC
  • 0
void read(int* arr) {
    ifstream file_if;
    file_if.open("arr.txt", ios::binary);
    if (!file_if.is_open())
        cout << "error opening file for reading" << endl;
    else
        file_if.read((char*)&arr, size); 
    file_if.close();
}

尺寸 - 阵列测量；

file_if.read((char*)&arr, size); - 立即从文件读取到整个数组，在此之前写入文件“file_of.write((char*)&arr, size);”

c++
Martin Hope
Dmitry Shevchenko
Asked: 2022-05-19 06:43:49 +0000 UTC
  • 0

我的代码只是在文件中添加了textBox3中的一行，但是需要写，也就是没有之前的记录。

using namespace System::IO;

private: System::Void button4_Click(System::Object^ sender, System::EventArgs^ e) {

    StreamWriter^ f = gcnew StreamWriter("Result.txt", true);
    f->Write(textBox3->Text);
    f->Write("\n");
    f->Close();
    MessageBox::Show(this, "Запись в файл выполнена", "Сообщение", MessageBoxButtons::OK, MessageBoxIcon::Information);
}
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