How Can I Efficiently Match Multiple Words in a String Using C \'s `std::regex`?

Matching Multiple Results with std::regex

Matching multiple occurrences of words in a string can be challenging with regular expressions. Although the expression "(bS*b){0,}" appears to match all consecutive words in a string, it may not yield the desired output. Instead, an iterative approach is recommended.

Following is the revised code:

#include <iostream>
#include <string>
#include <regex>

int main() {
    regex exp("(\b\S*\b)");
    smatch res;
    string str = "first second third forth";

    string::const_iterator searchStart(str.cbegin());
    while (regex_search(searchStart, str.cend(), res, exp)) {
        cout <p>In this updated code, we use a while loop to iterate through the string while performing regular expression searches. The loop starts by setting the searchStart iterator to the string's beginning. Then, within each iteration:</p>
<ol>
<li>The regex_search function searches for the first occurrence of the pattern within the substring starting at searchStart.</li>
<li>If a match is found, we print the matching word.</li>
<li>We update the searchStart iterator to start searching after the matched word.</li>
</ol>
<p>By iterating through the string until no more matches are found, we can output all the words one by one.</p></regex></string></iostream>

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