Question

C++

C++

We are prompting input from the users.

Users input "I like the book "The little prince" very much"

I want to separate this sentence by the order "I" "like" "the" "book" "the little prince" "very" "much". (Keep the quotation mark of little prince, because it is the way the user entered)

and adding this to a arraylist in c++  

Answer 1

#include <iostream>
#include <vector>

using namespace std;

vector<string> parseCSV(string s) {
        vector<string> result;

        // while string has a space
        while(s.find(" ") != string::npos) {
                int index = -1;
                bool insideQuote = false;
                for(int i=0; i<s.size(); i++) {
                        if(s[i] == '"') {
                                insideQuote = !insideQuote;
                        } else if(s[i] == ' ') {
                                if(!insideQuote) {
                                        index = i;
                                        break;
                                }
                        }
                }
                // break token from index.
                string token = s.substr(0, index);
                s = s.substr(index + 1);

                // remove space from start of token
                while(token != "" && token[0] == ' ') {
                        token = token.substr(1);
                }
                if(token != "") {
                        result.push_back(token);
                }
        }
        
        while(s != "" && s[0] == ' ') {
                s = s.substr(1);
        }
        if(s != "") {
                result.push_back(s);
        }

        return result;
}

int main() {
        string s = "I like the book \"The little prince\" very much";
        vector<string> tokens = parseCSV(s);

        for(string t: tokens) {
                cout << t << endl;
        }
}

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