Saya gak tau kalo ini bener gaknya :D

forward_chaining_example.cpp

#include <iostream>
#include <string>
#include <algorithm>

int main(){

    std::string weather, location, means, actions;
    int distance, time;
    std::cout<<"Distance ? ";
    std::cin>>distance;
    std::cout<<"Time in minutes ? ";
    std::cin>>time;
    std::cout<<"Weather: bad/good ? ";
    std::cin>>weather;
    std::cout<<"Location: Downtown / Not Downtown ? ";
    std::cin.ignore();
    std::getline(std::cin,location);
    std::cout<<std::endl;
    std::cout<<distance<<std::endl;
    std::cout<<time<<std::endl;
    std::cout<<weather<<std::endl;
    std::cout<<location<<std::endl;

    if(distance > 5){
        means = "drive";
    }else if(distance > 1 && time < 15){
        means = "drive";
    }else if(distance > 1 && time  > 15){
        means = "walk";
    }

    std::transform(location.begin(), location.end(), location.begin(), ::tolower);
    std::transform(weather.begin(), weather.end(), weather.begin(), ::tolower);

    if(means.compare("drive") == 0 && location.compare("downtown") == 0){
        actions = "take a cab";
    }else if(means.compare("drive") == 0 && location.compare("downtown") != 0){
        actions = "drive your car";
    }else if(means.compare("walk") == 0 && weather.compare("bad") == 0){
        actions = "take a coat and walk";
    }else if(means.compare("walk") == 0 && weather.compare("good") == 0){
        actions = "walk";
    }
    std::cout<<"Solutions : "<<actions;
}