/* * Copyright 2011 Steven Gribble * * This file is the solution to an exercise problem posed during * one of the UW CSE 333 lectures (333exercises). * * 333exercises is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * 333exercises is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with 333exercises. If not, see . */ // lec 11 exercise 3 // // Write a C++ function that: // - uses new to dynamically allocate an array of strings // - and uses delete[ ] to free it // - uses new to dynamically allocate an array of pointers to strings // - and then iterates through the array to use new to allocate a // string for each array entry and to assign to each array // element a pointer to the associated allocated string // - and then uses delete to delete each allocated string // - and then uses delete[] to delete the string pointer array // (whew!) #include #include int main(int argc, char **argv) { // Allocate an array of 10 strings std::string *s_arr = new std::string[10]; // Append to each string in the array. for (int i = 0; i < 10; i++) s_arr[i] += "Yo!"; // Free it delete[] s_arr; // Allocate an array of 10 string pointers. std::string **sptr_arr = new std::string*[10]; // Allocate a string for each array, assign array element to it. for (int i = 0; i < 10; i++) sptr_arr[i] = new std::string("yo!"); // Delete each allocated string. for (int i = 0; i < 10; i++) delete sptr_arr[i]; // Delete the array of string pointers. delete[] sptr_arr; return EXIT_SUCCESS; // defined in stdlib.h }