The most elegant way to iterate the words of a C/C++ string

C++Server Side ProgrammingProgramming

There is no one elegant way to iterate the words of a C/C++ string. The most readable way could be termed as the most elegant for some while the most performant for others. I've listed 2 methods that you can use to achieve this. First way is using a stringstream to read words seperated by spaces. This is a little limited but does the task fairly well if you provide the proper checks. 

example

#include <vector>
#include <string>
#include <sstream>
using namespace std;
int main() {
    string str("Hello from the dark side");
    string tmp;            // A string to store the word on each iteration.
    stringstream str_strm(str);
    vector<string> words;     // Create vector to hold our words
    while (str_strm >> tmp) {
        // Provide proper checks here for tmp like if empty
        // Also strip down symbols like !, ., ?, etc.
        // Finally push it.
        words.push_back(tmp);
    }
}

Another way is to provide a custom delimiter to split the string by using the getline function −

example

#include <vector>
#include <string>
#include <sstream>
using namespace std;
int main() {
    std::stringstream str_strm("Hello from the dark side");
    std::string tmp;
    vector<string> words;
    char delim = ' '; // Ddefine the delimiter to split by
    while (std::getline(str_strm, tmp, delim)) {
        // Provide proper checks here for tmp like if empty
        // Also strip down symbols like !, ., ?, etc.
        // Finally push it.
        words.push_back(tmp);
    }
}
raja
Published on 28-Feb-2018 06:27:36
Advertisements