How to Iterate through a String word by word in C++

Given a String comprising of many words separated by space, the task is to iterate over these words of the string in C++.

Example:

Input: str = {“GeeksforGeeks is a computer science portal for Geeks”};
Output:
GeeksforGeeks
is
a
computer
science
portal
for
Geeks

Input: str = {“Geeks for Geeks”};
Output:
Geeks
for
Geeks

Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Approach: istringstream class is best suitable for this purpose. When a string is given split by whitespace, this class can be used to easily fetch and use each word of the String.

Syntax:

string str = {"Geeks for Geeks"};
istringstream iss(str);

Below is the implementation of the above approach:

// C++ program to Iterate through 
// a String word by word 
  
#include <iostream> 
#include <sstream> 
#include <string> 
  
using namespace std; 
  
// Driver code 
int main() 
{ 
  
    // Get the String 
    string str = "GeeksforGeeks is a computer "
                 "science portal for Geeks"; 
  
    // Initialise the istringstream 
    // with the given string 
    istringstream iss(str); 
  
    // Iterate the istringstream 
    // using do-while loop 
    do { 
        string subs; 
  
        // Get the word from the istringstream 
        iss >> subs; 
  
        // Print the word fetched 
        // from the istringstream 
        cout << subs << endl; 
  
    } while (iss); 
  
    return 0; 
} 

Output:

GeeksforGeeks
is
a
computer
science
portal
for
Geeks

My Personal Notes

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