StringStream in C++ – Hacker Rank Solution | HackerRank Programming Solutions | HackerRank C++ Solutions

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Introduction To C++

C++ is a general-purpose programming language that was developed as an enhancement of the C language to include object-oriented paradigm. It is an imperative and a compiled language. 

C++ is a middle-level language rendering it the advantage of programming low-level (drivers, kernels) and even higher-level applications (games, GUI, desktop apps etc.). The basic syntax and code structure of both C and C++ are the same. 

C++ programming language was developed in 1980 by Bjarne Stroustrup at bell laboratories of AT&T (American Telephone & Telegraph), located in U.S.A. Bjarne Stroustrup is known as the founder of C++ language.

StringStream in C++

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.Note If you want to know how to push elements in a vector, solve the first problem in the STL chapter.6


Input Format :

The first and only line consists of n integers separated by commas.

Output Format :

Print the integers after parsing it.P.S.: I/O will be automatically handled. You need to complete the function only.


Sample Input :

23,4,56

Sample Output :

23
4
56
StringStream in C++ – Hacker Rank Solution
#include <sstream>
#include <vector>
#include <iostream>
using namespace std;

vector<int> parseInts(string str) 
{
	// Complete this function
    stringstream ss(str);
    vector<int> result;
    char ch;
    int tmp;

    while (ss >> tmp) 
    {
        result.push_back(tmp);
        ss >> ch;
    }

    return result;
}

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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