C++ examples for Function:Function Parameter
Using a reference parameter
#include <iostream> #include <iomanip> #include <string> #include <vector> using std::string; using std::vector; void find_words(vector<string>& words, string& str, const string& separators); void list_words(const vector<string>& words); int main()//from ww w .j av a 2 s.c om { string text; // The string to be searched std::cout << "Enter some text terminated by *:\n"; std::getline(std::cin, text, '*'); const string separators {" ,;:.\"!?'\n"}; // Word delimiters vector<string> words; // Words found find_words(words, text, separators); list_words(words); } void find_words(vector<string>& words, string& str, const string& separators) { unsigned int start {str.find_first_not_of(separators)}; // First word start index unsigned int end {}; // Index for end of a word while (start != string::npos) // Find the words { end = str.find_first_of(separators, start + 1); // Find end of word if (end == string::npos) // Found a separator? end = str.length(); // No, so set to last + 1 words.push_back(str.substr(start, end - start)); // Store the word start = str.find_first_not_of(separators, end + 1); // Find 1st character of next word } } void list_words(const vector<string>& words) { std::cout << "Your string contains the following " << words.size() << " words:\n"; unsigned int count {}; // Number output for (const auto& word : words) { std::cout << std::setw(15) << word; if (!(++count % 5)) std::cout << std::endl; } std::cout << std::endl; }