Question

How to split string by space into a vector in C++

Answer 1

#include <iostream>
#include <sstream>
#include <vector>
#include <iterator>
 
int main()
{
    std::string str = "C++ is a general purpose programming language";
     
    std::istringstream iss(str);
     
    std::vector<std::string> vec;
     
    copy(std::istream_iterator<std::string>(iss),
        std::istream_iterator<std::string>(),
        back_inserter(vec));
     
    for(auto const& s : vec) {
        std::cout << s << "\n";
    }
}
 
 
 
 
/*
run:
         
C++
is
a
general
purpose
programming
language
    
*/

 

 

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Answer 2

#include <iostream>
#include <sstream>
#include <vector>
#include <iterator>
 
std::vector<std::string> split_string_by_space_into_vector(std::string str) {
   std::istringstream iss(str);
     
    std::vector<std::string> vec;
     
    copy(std::istream_iterator<std::string>(iss),
        std::istream_iterator<std::string>(),
        back_inserter(vec)); 
        
    return vec;
}

int main()
{
    std::string str = "C++ is a general purpose programming language";

    std::vector<std::string> vec = split_string_by_space_into_vector(str);
     
    for(auto const& s : vec) {
        std::cout << s << "\n";
    }
}
 
 
 
 
/*
run:
         
C++
is
a
general
purpose
programming
language
    
*/

 

70+ SQL courses for beginners and professionals

Answer 3

#include <iostream>
#include <vector>

std::vector<std::string> split_string_by_space_into_vector(std::string str) {
    std::vector<std::string> vec;
    std::string word;
     
    for (char ch : str) {
        if (ch == ' ') {
            vec.push_back(word);
            word = "";
        } else {
            word += ch;
        }
    }
     
    vec.push_back(word);
        
    return vec;
}

int main()
{
    std::string str = "C++ is a general purpose programming language";

    std::vector<std::string> vec = split_string_by_space_into_vector(str);
     
    for(auto const& s : vec) {
        std::cout << s << "\n";
    }
}
 
 
 
 
/*
run:
         
C++
is
a
general
purpose
programming
language
    
*/

 

 

70+ SQL courses for beginners and professionals