String* x; int main () { } p(); q(); int p() { ... X new String[10]; int q () { } delete x
String* x; int main () { } p(); q(); int p() { ... X new String[10]; int q () { } delete x
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
Related questions
Question
Can you help me understand this question better? Please give a clear and detailed answer, and if possible, break it down into parts to make it easier for me to grasp.
question:
When does lifetime of heap allocated objects begin and end?
![```cpp
String* x;
int main () {
p();
q();
}
int p() {
...
x = new String[10];
...
}
int q() {
...
delete x;
...
}
```
In this code snippet, we see three main sections:
1. **Declaration**: `String* x;`
- This declares a pointer `x` of type `String`.
2. **Function `p()`**:
- The function `p()` is responsible for dynamically allocating an array of 10 `String` objects and assigning it to pointer `x`.
3. **Function `q()`**:
- The function `q()` deletes the memory allocated to `x`, freeing up the resources.
This snippet demonstrates basic dynamic memory allocation and deallocation using pointers in a programming language. Note that error handling and safe use practices are not shown; this is a basic illustrative example.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbebdfd8f-c6ea-4dde-abb0-eb5c1c681005%2F42bed6c6-7d92-4c13-bc16-ebf8cb508822%2Fo7t334_processed.jpeg&w=3840&q=75)
Transcribed Image Text:```cpp
String* x;
int main () {
p();
q();
}
int p() {
...
x = new String[10];
...
}
int q() {
...
delete x;
...
}
```
In this code snippet, we see three main sections:
1. **Declaration**: `String* x;`
- This declares a pointer `x` of type `String`.
2. **Function `p()`**:
- The function `p()` is responsible for dynamically allocating an array of 10 `String` objects and assigning it to pointer `x`.
3. **Function `q()`**:
- The function `q()` deletes the memory allocated to `x`, freeing up the resources.
This snippet demonstrates basic dynamic memory allocation and deallocation using pointers in a programming language. Note that error handling and safe use practices are not shown; this is a basic illustrative example.
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