StringStream – HackerRank Solution

StringStream – HackerRank Solution

Problem :

stringstream is a stream class to operate on strings. It basically implements input/output operations on memory (string) based streams. stringstream can be helpful in different type of parsing. The following operators/functions are commonly used here

  • Operator >> Extracts formatted data.
  • Operator << Inserts formatted data.
  • Method str() Gets the contents of underlying string device object.
  • Method str(string) Sets the contents of underlying string device object.

Its header file is sstream.

One common use of this class is to parse comma-separated integers from a string (e.g., “23,4,56”).

stringstream ss("23,4,56");
char ch;
int a, b, c;
ss >> a >> ch >> b >> ch >> c;  // a = 23, b = 4, c = 56

You have to complete the function vector parseInts(string str)str will be a string consisting of comma-separated integers, and you have to return a vector of int representing the integers.

Sample Input :

23,4,56

Sample Output :

23
4
56

Solution :

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

vector<int> parseInts(string str) {
    vector<int> str2(3);
    stringstream ss(str);
    char ch;
    ss >> str2[0] >> ch >> str2[1] >> ch >> str2[2]; 
    return str2;
}

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;
}

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