Algorithm
Problem Name:
In this HackerRank Functions in C++ programming problem solution,
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 * 10**5
Sample Input
23,4,56
Sample Output
23
4
56
Code Examples
#1 Code Example with C++ Programming
Code -
C++ Programming
#include <sstream>
#include <vector>
#include <iostream>
using namespace std;
vector<int> passInt(string a);
int main(void)
{
string a;
cin >> a;
vector<int> integers = passInt(a);
for(int i = 0; i < integers.size(); i++)
cout << integers[i] << endl;
return 0;
}
vector<int> passInt(string a)
{
stringstream s(a);
vector<int>b;
int i;
while(s >> i){
b.push_back(i);
if(s.peek() == ',')
s.ignore();
}
return b;
}
Input
Output