C++ 错误 : expected primary-expression before '&' token

Question

我正在学习 C++，我有以下代码，它在第 39 行(fill_file() 调用)中给出了错误。我在网上搜索了解决方案，但找不到出现此错误的原因(在“&”标记之前应为主要表达式)。

#include <iostream>
#include <string>
#include <vector>
#include "../std_lib_facilities.h"
using namespace std;

struct Point {
    double x;
    double y;
};

void fill_file(vector<Point>& original_points) {
    string outputfile="mydata.txt";
    ofstream ost{outputfile};
    if(!ost) error("Can't open outputfile ", outputfile);
    for(int i=0;i<original_points.size();i++) {
        ost << original_points[i].x << " " << original_points[i].y << endl;
    }
}

int main() {
    cout << "Please enter 3 points with a value: " << endl;
    vector<Point> original_points;
    Point p;
    double x;
    double y;
    for(int i=0;i<3;i++) {
        cin>>p.x;
        cin>>p.y;
        original_points.push_back(p);
    }
    cout << endl;
    cout << endl << "Points: " << endl;
    for(int i=0;i<original_points.size();i++) {
        cout << original_points[i].x << " " << original_points[i].y << endl;
        /* ost << original_points[i].x << " " << original_points[i].y << endl; */
    }
    cout << endl << endl;
    fill_file(vector<Point>& original_points);
    return 0;
}

我做错了什么？感谢您的帮助!!

Answer 1

您在调用 fill_file 函数时犯了一个错误:

fill_file(vector<Point>& original_points);

必须这样调用:

fill_file(original_points);