Question

How to extract the first two words from a string in C++

Answer 1

#include <iostream>
#include <sstream>
 
std::string FirstNWords(std::string str, int N) {
    std::stringstream iss(str);
     
    std::string word, firstn = "";  
    while (N != 0 && iss >> word) {
        firstn += word + " ";
        N--;
    }
         
    return firstn;        
}
  
  
int main() {
    std::string s = "c++ c c# java python";
    int N = 2;
      
    std::string first2 = FirstNWords(s, N);
     
    std::cout << first2;
      
    return 0;
}
  
  
  
  
  
/*
run:
  
c++ c
  
*/

 

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Answer 2

#include <iostream>
#include <sstream>

int main() {
    std::string s = "c++ c c# java python";

    std::stringstream iss(s);
    
    std::string word;
    iss >> word;
    std::string first2 = word + " ";
    iss >> word;
    first2 += word;
    
    std::cout << first2;
      
    return 0;
}
  
  
  
  
  
/*
run:
  
c++ c
  
*/

 

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