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boost::split in C++ library
  • Difficulty Level : Basic
  • Last Updated : 28 Jan, 2018


This function is similar to strtok in C. Input sequence is split into tokens, separated by separators. Separators are given by means of the predicate.

Syntax:

Template:
split(Result, Input, PredicateT Pred);

Parameters:
Input: A container which will be searched.
Pred: A predicate to identify separators. 
This predicate is supposed to return true 
if a given element is a separator.
Result: A container that can hold copies of 
references to the substrings.

Returns: A reference the result

Application : It is used to split a string into substrings which are separated by separators.

Example:

Input : boost::split(result, input, boost::is_any_of("\t"))
       input = "geeks\tfor\tgeeks"
Output : geeks
        for
        geeks
Explanation: Here in input string we have "geeks\tfor\tgeeks"
and result is a container in which we want to store our result
here separator is "\t".
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code

// C++ program to split
// string into substrings
// which are separated by
// separater using boost::split
  
// this header file contains boost::split function
#include <bits/stdc++.h>
#include <boost/algorithm/string.hpp>
using namespace std;
  
int main()
{
    string input("geeks\tfor\tgeeks");
    vector<string> result;
    boost::split(result, input, boost::is_any_of("\t"));
  
    for (int i = 0; i < result.size(); i++)
        cout << result[i] << endl;
    return 0;
}

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Output:

geeks
for
geeks        

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