c++ - 尝试使用 2 个函数写入一个文件

Question

我有一个项目需要我使用两个函数在输出文件中打印数据。一个函数打印 vector 的值，另一个打印数组的值。但是，在 main 中调用的第二个函数会覆盖第一个函数打印的内容。我试过在第一个函数中打开文件并在第二个函数中关闭它，但这没有用。显然，当您从一个函数移动到另一个函数时，写入位置将重置为文件的开头。但是，我无法使用 seekp()；因为我们实际上并没有在类里面讲过。关于我应该如何执行此操作的任何见解？

void writeToFile(vector<int> vec, int count, int average)
{
    ofstream outFile;

    outFile.open("TopicFout.txt");

    // Prints all values of the vector into TopicFout.txt
    outFile << "The values read are:" << endl;
    for (int number = 0; number < count; number++)
        outFile << vec[number] << "  ";

    outFile << endl << endl << "Average of values is " << average;

}

void writeToFile(int arr[], int count, int median, int mode, int countMode)
{
    ofstream outFile;

    // Prints all values of the array into TopicFout.txt
    outFile << "The sorted result is:" << endl;
    for (int number = 0; number < count; number++)
        outFile << arr[number] << "  ";

    outFile << endl << endl << "The median of values is " << median << endl << endl;

    outFile << "The mode of values is " << mode << " which occurs " << countMode << " times." << endl << endl;

    outFile.close();
}

Answer 1

使用 outFile.open("TopicFout.txt", ios_base::app | ios_base::out); 而不仅仅是 outFile.open("TopicFout.txt");