<<StringStream>>_HakerRank_C++_Strings

#include <sstream>#include <vector>#include <iostream>using namespace std;vector<int> parseInts(string str) {//Complete this function    stringstream ss(str);    vector<int> vec ;    int i ;    char c ;    while(!ss.eof())    {        ss >> i >> c ;        vec.push_back(i) ;     }    return vec ;}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;}

In this challenge, we work with string streams.

stringstream is a stream class to operate on strings. It 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

Here ch is a storage area for the discarded commas.
If the >> operator returns a value, that is a true value for a conditional. Failure to return a value is false.
Given a string of comma delimited integers, return a vector of integers.

Function Description
Complete the parseInts function in the editor below.
parseInts has the following parameters:
• string str: a string of comma separated integers

Returns
• vector: a vector of the parsed integers.
Note You can learn to push elements onto a vector by solving the first problem in the STL chapter.

Input Format
There is one line of n integers separated by commas.

Constraints
The length of str is less than 8⨯10⁵.

Sample Input
23,4,56

Sample Output
23
4
56