C++ Dynamic Memory Allocation: Integer, character, string assignment
C++ Dynamic Memory Allocation: Exercise-1 with Solution
Write a C++ program to dynamically allocate an integer, a character and a string and assign a value to them.
Sample Solution:
C Code:
#include <iostream> // Including the Input/Output Stream Library
#include <string> // Including the String Library
int main() {
// Dynamically allocate an integer
int * dynamicInt = new int; // Allocating memory for an integer and storing its address in dynamicInt
* dynamicInt = 20; // Assigning a value of 20 to the dynamically allocated integer
// Dynamically allocate a character
char * dynamicChar = new char; // Allocating memory for a character and storing its address in dynamicChar
* dynamicChar = 'C'; // Assigning the character 'C' to the dynamically allocated char
// Dynamically allocate a string
std::string * dynamicString = new std::string; // Allocating memory for a string and storing its address in dynamicString
* dynamicString = "C++ Dynamically allocated string."; // Assigning a string value to the dynamically allocated string
// Display the values
std::cout << "Dynamically allocated integer: " << * dynamicInt << std::endl; // Output the dynamically allocated integer value
std::cout << "Dynamically allocated character: " << * dynamicChar << std::endl; // Output the dynamically allocated character
std::cout << "Dynamically allocated string: " << * dynamicString << std::endl; // Output the dynamically allocated string
// Deallocate the memory
delete dynamicInt; // Deallocating the memory occupied by the dynamically allocated integer
delete dynamicChar; // Deallocating the memory occupied by the dynamically allocated character
delete dynamicString; // Deallocating the memory occupied by the dynamically allocated string
return 0; // Returning 0 to indicate successful execution of the program
}
Sample Output:
Dynamically allocated integer: 20 Dynamically allocated character: C Dynamically allocated string: C++ Dynamically allocated string.
Explanation:
In the above exercise,
- Use the new operator to dynamically allocate memory for an integer, a character, and a string. The new operator returns a pointer to the allocated memory.
- Assign values to dynamically allocated variables using the dereference operator. For example, dynamicInt = 20 assigns 20 to the dynamically allocated integer.
- Display the values of dynamically allocated variables using std::cout.
- Finally, deallocate dynamically allocated memory using the delete operator.
Flowchart:
CPP Code Editor:
Contribute your code and comments through Disqus.
Previous C++ Exercise: C++ Dynamic Memory Allocation Exercises Home.
Next C++ Exercise: Array of integers and strings initialization.
What is the difficulty level of this exercise?
It will be nice if you may share this link in any developer community or anywhere else, from where other developers may find this content. Thanks.
https://w3resource.com/cpp-exercises/dynamic-memory-allocation/cpp-dynamic-memory-allocation-exercise-1.php
- Weekly Trends and Language Statistics
- Weekly Trends and Language Statistics