如何根据C++中给出的信息使用getline()读取文件中的下一个单词？

istream& getline (istream& is, string& str, char delim);

ifstream inputFile("filename.txt");

string word;

getline(inputFile, word, ' ');

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

using namespace std;

int main() {
    ifstream inputFile("filename.txt");
    string word;

    if (inputFile.is_open()) {
        while (getline(inputFile, word, ' ')) {
            // 处理读取到的单词
            cout << word << endl;
        }
        inputFile.close();
    } else {
        cout << "Unable to open file." << endl;
    }

    return 0;
}