如何在C++中输出来自已保存的.html文件的<a href>标记中的所有链接？

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

using namespace std;

int main() {
    ifstream file("example.html");
    string line;
    
    while (getline(file, line)) {
        size_t start = line.find("<a href");
        if (start != string::npos) {
            size_t end = line.find("</a>");
            string anchorTag = line.substr(start, end - start + 4);
            
            size_t linkStart = anchorTag.find("\"") + 1;
            size_t linkEnd = anchorTag.find("\"", linkStart);
            string link = anchorTag.substr(linkStart, linkEnd - linkStart);
            
            cout << "Link: " << link << endl;
        }
    }
    
    file.close();
    
    return 0;
}