如何使用getline()将输入复制到输出文件C++中

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

int main() {
    std::string inputFileName = "input.txt";  // 输入文件名
    std::string outputFileName = "output.txt";  // 输出文件名

    // 打开输入文件和输出文件
    std::ifstream inputFile(inputFileName);
    std::ofstream outputFile(outputFileName);

    if (!inputFile) {
        std::cerr << "Failed to open input file: " << inputFileName << std::endl;
        return 1;
    }

    if (!outputFile) {
        std::cerr << "Failed to open output file: " << outputFileName << std::endl;
        return 1;
    }

    std::string line;
    while (std::getline(inputFile, line)) {
        outputFile << line << std::endl;  // 将读取的行写入输出文件
    }

    // 关闭输入文件和输出文件
    inputFile.close();
    outputFile.close();

    std::cout << "Copy successful!" << std::endl;

    return 0;
}