写一个输入为用鼠标拖入的.txt文件的C++所写编译的.exe文件的框架

以下是一个读取用鼠标拖入的.txt文件并输出其内容的C++程序的框架：

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

int main(int argc, char *argv[]) {
    // Check if a file was dragged onto the executable
    if (argc != 2) {
        cout << "Please drag and drop a .txt file onto the executable!" << endl;
        return 1;
    }

    // Open the file
    ifstream file(argv[1]);
    if (!file.is_open()) {
        cout << "Failed to open file!" << endl;
        return 1;
    }

    // Read and output the file line by line
    string line;
    while (getline(file, line)) {
        cout << line << endl;
    }

    // Close the file and exit
    file.close();
    return 0;
}

当你将以上代码保存为.cpp文件并编译后，你可以将它拖到一个.txt文件上来运行。