Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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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.](https://content.bartleby.com/qna-images/question/bebdfd8f-c6ea-4dde-abb0-eb5c1c681005/42bed6c6-7d92-4c13-bc16-ebf8cb508822/o7t334_processed.jpeg)
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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