C++ How to Program (10th Edition)
C++ How to Program (10th Edition)
10th Edition
ISBN: 9780134448237
Author: Paul J. Deitel, Harvey Deitel
Publisher: PEARSON
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QUESTION 6 Which of the following is NOT true? (Choose all that apply) 01. None II. A dangling pointer is an allocated stack-dynamic pointer variable without any reference. III. Dangling pointers are harmful for the programs. OV. A program with memory leak is free from creating garbage.
Language: C Write a program that will allocate memory to an array of the size specified by the user at runtime. Use malloc and free. Fill the array, print the elements and calculate the average value. A. In the main function: a) Ask the user for the size of the array. b) Using the malloc function allocate the double array of the size specified by the user. c) Check if the allocation was successful. - If the address returned by malloc is not NULL, use the rand function in a for loop and assign pseudorandom values to the array elements. Then call the function averagevalue. Print the result. Free up memory with the free function. - If the allocation failed and the address returned by malloc is NULL, print the message and exit the program. B. Define the function averagevalue and then call it in main. The function calculates the average value of the elements of the array passed as an argument and prints the array elements to the screen. The function returns the average value. C. Use…
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…
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