Discussion on StringStream Challenge

2 years ago+ 1 comment

So, I wrote this code and this works too, though I still have a doubt: in the for loop where I do v.push_back(a), how does the code know where to begin parsing stringstream ss. I mean it could just keep on parsing the first integer and the first character.

Can somebody please explain this?

#include <sstream>
#include <vector>
#include <iostream>
using namespace std;

vector<int> parseInts(string str) {
    int n = 0;
    for (int i=0; i<str.size(); ++i) {
        if (str[i]==',') ++n;
    }
    
    vector<int> v;
    stringstream ss(str);
    
    for (int i=0; i<=n; ++i) {
        char ch;
        int a;
        ss >> a >> ch;
        v.push_back(a);
    }
    
    return v;
}

int main() {
    string str;
    cin >> str;
    vector<int> integers = parseInts(str);
    for(int i = 0; i < integers.size(); i++) {
        cout << integers[i] << "\n";
    }
    
    return 0;
}

2 years ago+ 2 comments

by vector v the element is inserted that is pushback of a.

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