Pointers and dynamic memory. a. Given the declarations what does statement 1 do? float x; float* ptr = &x; *ptr = 24.9; || statement 1 b. Write a statement that dynamically allocates memory for a float and returns the address into the pointer variable declared in part a. c. Assign the value 12 to the memory dynamically allocated in part b and pointed to by the pointer variable in part a.

Pointers and dynamic memory. a. Given the declarations what does statement 1 do? float x; float* ptr = &x; *ptr = 24.9; || statement 1 b. Write a statement that dynamically allocates memory for a float and returns the address into the pointer variable declared in part a. c. Assign the value 12 to the memory dynamically allocated in part b and pointed to by the pointer variable in part a.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Concept of Pointer Parameter

Pointers are the special variable that stores the variable address, instead of storing the variable value. Pointer is a powerful feature of a programming language. A pointer is mostly used to save memory space and improve execution time.

Question

5. Pointers and dynamic memory.
a. Given the declarations what does statement 1 do?
float x;
float* ptr = &x;
%3D
*ptr = 24.9; Il statement 1
%3D
b. Write a statement that dynamically allocates memory for a float and returns the
address into the pointer variable declared in part a.
c. Assign the value 12 to the memory dynamically allocated in part b and pointed
to by the pointer variable in part a.

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