Question

编辑：我已经解决了参考问题，谢谢大家的帮助，我现在能够编译并运行一切正常，但我无法弄清楚为什么程序在完成mainMenu（）函数之前返回0现在：

#include <iostream>
#include <fstream>

using namespace std;

int welcomeScreen(int &success) {

    string keyContinue;
    bool loop = true;

while(loop) {
    cout << "Welcome, traveler! Press 'Q' to continue to the main menu." << endl;
    cin >> keyContinue;

    if (keyContinue == "q") {
        success = 1;
        break;
    }
}

    return success;
}

void mainMenu() {

    int success;
    int menuSelection;

    bool loop;

    if (success) {
        cout << "MAIN MENU: \n" << endl;
        cout << "1. Login \n2. Register" << endl;
while(loop) {
        cin >> menuSelection;

        switch(menuSelection) {
            case 1 : cout << "login screen" << endl;
            break;
            case 2 : cout << "register screen" << endl;
            break;
            default : cout << "Please select an option from the menu..." << endl;
        }
}
    }
}

void exit() {

}

int main()
{
    int success;

    welcomeScreen(success);
    if (success) {
        mainMenu();
    }

    return 0;
}

当我输入'Q'时，程序显示'MAIN MENU'和2个选项，但在我选择一个选项之前返回0，我无法找出原因。我是学习C ++的新手，这可能是一种很难学习的方式，但我感谢大家的帮助。

Answer 1

尝试var express = require('express'); var app = express(); var cheerio = require('cheerio'); var request = require('request'); var fs = require('fs'); app.listen(8080); console.log('Running'); app.get('/', function(req, res) { console.log('Recieved the get Request'); var i = 1; var count = 0; while (count < 10) { var url = 'http://www.imdb.com/title/tt' + i + '/'; console.log(url); count = count + 1; i = i + 1; request(url, function(error, response, html) { if (!error) { var $ = cheerio.load(html); var title, ratings, released; var json = { title: '', ratings: '', released: '' }; $('.title_wrapper').filter(function() { var data = $(this); json.title = data.children().first().text().trim(); json.released = data.children().last().children().last().text().trim(); }); $('.ratingValue').filter(function() { var data = $(this); json.ratings = parseFloat(data.text().trim()); }); console.log(json); fs.appendFile('message.txt', JSON.stringify(json, null, 4) + '\n', function(err) {}); }; }); }; res.sendFile(__dirname + '/index.js'); });或先尝试分配成功，然后再将其传递。你没有成功，但结果是

mainMenu (const int &passed)

你还有mainMenu的原型吗？试着写

sucess = 1

之前int mainMenu(const int& passed);

C ++ - 程序在完成我的功能之前返回0

1 个答案: