Problem Statement
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.
Input Format
The first and only line consists of n comma-separated integers.
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
Solution
#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <sstream>
using namespace std;
vector parseInts(string str) {
// Complete this function
stringstream ss(str);
char ch;
int temp;
vector res;
while(ss>>temp)
{
res.push_back(temp);
if (ss.peek() == ',')
ss.ignore();
}
return res;
}
int main() {
string str;
cin >> str;
vector integers = parseInts(str);
for(int i = 0; i < integers.size(); i++) {
cout << integers[i] << "\n";
}
return 0;
}