Part II: Understand Pointers/Dynamic Memory To-do 2: Write 3 different functions in C++ to create memory on the heap without causing a memory leak. Hint: You will need to assign the address to a pointer that was created outside the function. Remember, you can return an address or change what a pointer points to (the contents of a pointer) in a function by passing the pointer by reference or by passing the address of the pointer. Additional questions: What if you want to change the contents of what the pointer points to? Make a function that will set the contents of the space on the heap. Do you still need to pass by reference or the address of the pointer? Why or why not? How will you delete the memory off the heap? Try doing it outside a function, and inside a function. Make sure your delete function is setting your pointer back to NULL, since it is not supposed to be pointing anywhere anymore. You can check to see if you have any memory leaks using valgrind. svalgrind program_exe Part IlII: Implementing 1-D arrays in assignment 4 To-do 3: Create a C-style string that will hold a sentence/paragraph inputted by the user. • You can make a static array for this, but make sure your getline has the appropriate length. • Use cin.getline (array_name, num_chars_to_read) for C-style strings. • What do you think may happen if you enter more characters than specified by num_chars_to_read in cin.getline ()? The code below may help this problem. if (cin.fail(0) { cin.ignore (256,'\n'); //get rid of everything leftover cin.clear (); //reset the failbit for the next cin To-do 4: Create an array of C++ strings for any N number of words that user wants to search for and read those words from the user. • Ask the user how many words they want to search for. • Create an array of that many words • Read each word from the user. Remember, you would use getline for C++ strings. getline (cin, word array_name [i]); You need to have a main function that asks for a sentence/paragraph and for the N words. After getting inputs from the user, print out both arrays to check if they are working properly. Remember to check memory leaks as well.

Part II: Understand Pointers/Dynamic Memory To-do 2: Write 3 different functions in C++ to create memory on the heap without causing a memory leak. Hint: You will need to assign the address to a pointer that was created outside the function. Remember, you can return an address or change what a pointer points to (the contents of a pointer) in a function by passing the pointer by reference or by passing the address of the pointer. Additional questions: What if you want to change the contents of what the pointer points to? Make a function that will set the contents of the space on the heap. Do you still need to pass by reference or the address of the pointer? Why or why not? How will you delete the memory off the heap? Try doing it outside a function, and inside a function. Make sure your delete function is setting your pointer back to NULL, since it is not supposed to be pointing anywhere anymore. You can check to see if you have any memory leaks using valgrind. svalgrind program_exe Part IlII: Implementing 1-D arrays in assignment 4 To-do 3: Create a C-style string that will hold a sentence/paragraph inputted by the user. • You can make a static array for this, but make sure your getline has the appropriate length. • Use cin.getline (array_name, num_chars_to_read) for C-style strings. • What do you think may happen if you enter more characters than specified by num_chars_to_read in cin.getline ()? The code below may help this problem. if (cin.fail(0) { cin.ignore (256,'\n'); //get rid of everything leftover cin.clear (); //reset the failbit for the next cin To-do 4: Create an array of C++ strings for any N number of words that user wants to search for and read those words from the user. • Ask the user how many words they want to search for. • Create an array of that many words • Read each word from the user. Remember, you would use getline for C++ strings. getline (cin, word array_name [i]); You need to have a main function that asks for a sentence/paragraph and for the N words. After getting inputs from the user, print out both arrays to check if they are working properly. Remember to check memory leaks as well.

C++ Programming: From Problem Analysis to Program Design

8th Edition

ISBN:9781337102087

Author:D. S. Malik

Publisher:D. S. Malik

Chapter12: Points, Classes, Virtual Functions And Abstract Classes

Section: Chapter Questions

Problem 1TF

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