find nth word in sentence c++
#include <iostream> #include <string> #include <vector> using namespace std; void splitString(const string &str, vector<string> &output) { string::size_type start = 0; // Where to start string::size_type last = str.find_first_of(" "); // Finds the first space // npos means that the find_first_of wasn't able to find what it was looking for // in this case it means it couldn't find another space so we are at the end of the // words in the string. while (last != string::npos) { // If last is greater then start we have a word ready if (last > start) { output.push_back(str.substr(start, last - start)); // Puts the word into a vector look into how the method substr() works } start = ++last; // Reset start to the first character of the next word last = str.find_first_of(" ", last); // This means find the first space and we start searching at the first character of the next word } // This will pickup the last word in the file since it won't be added to the vector inside our loop output.push_back(str.substr(start)); } int main() { string myString("how are you doing"); vector<string> words; splitString(myString, words); for (auto i = 0; i != words.size(); ++i) cout << words[i] << endl; }
