C++：如何在使用带有ifstream对象的getline()从文件中读取一行时跳过第一个空格？

#include <fstream>
ifstream file("filename.txt");

string line;

getline(file, line);

size_t start = line.find_first_not_of(" ");

string result = line.substr(start);

#include <iostream>
#include <fstream>
using namespace std;

int main() {
    ifstream file("filename.txt");
    string line;
    while (getline(file, line)) {
        size_t start = line.find_first_not_of(" ");
        string result = line.substr(start);
        cout << result << endl;
    }
    file.close();
    return 0;
}