有效地将文件读取到std::string，并以windows行结尾

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

std::string readFileToString(const std::string& filePath) {
    std::ifstream file(filePath);
    std::string fileContent;

    if (file.is_open()) {
        std::string line;
        while (std::getline(file, line)) {
            fileContent += line + "\r\n";
        }
        file.close();
    } else {
        std::cout << "Failed to open file: " << filePath << std::endl;
    }

    return fileContent;
}

int main() {
    std::string filePath = "C:\\path\\to\\file.txt";
    std::string fileContent = readFileToString(filePath);
    std::cout << fileContent << std::endl;

    return 0;
}