Question

How to match the first word after an expression in a string using RegEx with C++

Answer 1

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

int main() {
    std::string text = "The quick brown fox jumps over the lazy dog.";
    std::string expression = "fox"; // The expression to match before the word
    
    // Match 'expression' followed by whitespace and a word
    std::regex pattern(expression + R"(\s+(\w+))"); 
    std::smatch match;

    if (std::regex_search(text, match, pattern)) {
        std::cout << "The first word after '" << expression << "' is: " << match[1] << std::endl;
    } else {
        std::cout << "No match found!" << std::endl;
    }
}



/*
run:

The first word after 'fox' is: jumps

*/

 

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