Lab Session 6 - Answer to Exercise 4

main.cpp

#include <iostream>

using namespace std;

string extract_bolds(string input) {
    string result;
    string working = input;
    
    while (working.find("<b>") != -1 && working.find("</b>") != -1) {
        int first = working.find("<b>") + 3;
        int second = working.find("</b>");
        
        string word = working.substr(first, second - first);
        
        result += word + ", ";
        
        working = working.substr(second + 4);
    }
    
    return result;
}


void test_extract_bolds(string sentence, string expected) {
    string result = extract_bolds(sentence);
    if (result != expected) {
        cout << "FAILURE: Failed on input '" << sentence << "'. Expected '"
        << expected << "' but got '" << result << "'." << endl;
    } else {
        cout << "SUCCESS: Succeeded on input '" << sentence << "'. Got '"
        << result << "'." << endl;
    }
}

int main() {
    test_extract_bolds("Hello <b>world</b>!", "world, ");
    test_extract_bolds("<b>Hello</b> cruel <b>world!</b>", "Hello, world!, ");
    test_extract_bolds("To <b>succeed</b> in <b>life</b> one must be <b>bold</b>!", "succeed, life, bold, ");

    return 0;
}