c++ - 如何用 C++ 编写基本的来回对话

Question

我想编写一个允许用户和计算机之间来回通信的基本脚本。例如

USER: what's your name?
BOT: my name is John
USER: what's today's weather?
BOT: the weather is sunny

我目前的代码是...

#include <iostream>
#include <map>
#include <vector>
#include <string>

using namespace std;

string respond(map<string, vector<string> > responses, string message) 
{
    if(responses.find(message) != responses.end()){
        return responses[message][0];
    } else {
        return responses["default"][0];
    }
}

int main(){
    map<string, vector<string> > responses;

    vector<string> temp;
    temp.push_back("my name is John");
    temp.push_back("they call me John");
    temp.push_back("I go by John");
    responses["what's your name?"] = temp;

    vector<string> temp1;
    temp1.push_back("the weather is sunny");
    temp1.push_back("it's cloudy today");
    responses["what's today's weather?"] = temp1;

    vector<string> temp2;
    temp2.push_back("default message");
    responses["default"] = temp2;

    while(1){
        cout << "Write your message to the bot and press ENTER" << 
 endl;
        string user_msg;
        cout << "USER: ";
        cin >> user_msg;
        if(user_msg == "quit"){
            break;
        }
        else{
            string temp = respond(responses, user_msg);
            cout << temp << endl;
        }
    }


    return 0;
}

现在，当我输入其中一个 responses[](即 你叫什么名字？/今天天气如何？)时，我回来了……

Write your message to the bot and press ENER
USER: what's your name?
default message
Write your message to the bot and press ENER
USER: default message
Write your message to the bot and press ENER
USER: default message
Write your message to the bot and press ENER
USER: 

如能帮助解决此问题，我们将不胜感激。谢谢

Answer 1

您输入的字符串不正确。在方法respond 中，message 的值就是what's。发生这种情况是因为您使用的 cin 在遇到空格后未读取输入。你可以使用类似 getline 的东西反而。

cout << "USER: ";
// Do this
std::getline (std::cin, user_msg);

这是您的代码的一个工作示例:http://cpp.sh/5dnrh