C Memory Archives - CodeCapsule

C Memory Management Example

📌 C Memory Management Example Here is a full practical of C Memory Management Example demonstrating malloc, calloc, realloc, and free all in one program. ✅ Full Example: Dynamic Array with Memory Operations

#include <stdio.h>
#include <stdlib.h>

int main() {
int *arr;
int n;

// Step 1: Ask user for the size
printf("Enter number of elements: ");
scanf("%d", &n);

// Step 2: Allocate memory using malloc
arr = (int *)malloc(n * sizeof(int));

if (arr == NULL) {
printf("Memory allocation failed!\n");
return 1;
}

printf("\nMemory allocated using malloc.\n");

// Step 3: Take user input
printf("Enter %d elements:\n", n);
for (int i = 0; i < n; i++) {
scanf("%d", &arr[i]);
}

// Step 4: Display values
printf("\nValues stored in array:\n");
for (int i = 0; i < n; i++) {
printf("%d ", arr[i]);
}

// Step 5: Increase memory using realloc
int newSize;
printf("\n\nEnter new size (larger than previous): ");
scanf("%d", &newSize);

arr = (int *)realloc(arr, newSize * sizeof(int));

if (arr == NULL) {
printf("Memory reallocation failed!\n");
return 1;
}

printf("\nMemory reallocated using realloc.\n");

// Step 6: Initialize new values (if size increased)
for (int i = n; i < newSize; i++) {
arr[i] = 0;
}

// Step 7: Display updated array
printf("\nUpdated array values:\n");
for (int i = 0; i < newSize; i++) {
printf("%d ", arr[i]);
}

// Step 8: Free allocated memory
free(arr);
printf("\n\nMemory freed successfully.\n");

return 0;
}

#include <stdio.h>

#include <stdlib.h>

int main() {

int *arr;

int n;

// Step 1: Ask user for the size

printf("Enter number of elements: ");

scanf("%d", &n);

// Step 2: Allocate memory using malloc

arr = (int *)malloc(n * sizeof(int));

if (arr == NULL) {

printf("Memory allocation failed!\n");

return 1;

}

printf("\nMemory allocated using malloc.\n");

// Step 3: Take user input

printf("Enter %d elements:\n", n);

for (int i = 0; i < n; i++) {

scanf("%d", &arr[i]);

}

// Step 4: Display values

printf("\nValues stored in array:\n");

for (int i = 0; i < n; i++) {

printf("%d ", arr[i]);

}

// Step 5: Increase memory using realloc

int newSize;

printf("\n\nEnter new size (larger than previous): ");

scanf("%d", &newSize);

arr = (int *)realloc(arr, newSize * sizeof(int));

if (arr == NULL) {

printf("Memory reallocation failed!\n");

return 1;

}

printf("\nMemory reallocated using realloc.\n");

// Step 6: Initialize new values (if size increased)

for (int i = n; i < newSize; i++) {

arr[i] = 0;

}

// Step 7: Display updated array

printf("\nUpdated array values:\n");

for (int i = 0; i < newSize; i++) {

printf("%d ", arr[i]);

}

// Step 8: Free allocated memory

free(arr);

printf("\n\nMemory freed successfully.\n");

return 0;

}

...

C Memory

C Structures and Dynamic Memory

📌 C Structures and Dynamic Memory Allocation C Structures and Dynamic Memory allocation can also be applied to structures, allowing flexible creation of objects at runtime.This is useful when the number of elements is...

C Memory

C Deallocate Memory

🧹 C Deallocate Memory (free()) In C Deallocate Memory, dynamic memory allocation is done using functions like malloc(), calloc(), and realloc().However, this memory is not automatically released — you must manually free it using...

C Memory

C Reallocate Memory

✅ C Reallocate Memory realloc()? In C Reallocate Memory The function realloc() is used to change the size of memory that was allocated using malloc() or calloc(). It can: Increase the memory block size...

C Memory

C Access Memory

1. C Access Memory Using Pointers A pointer stores the address of a variable. Use dereferencing (*) to access or modify the value at that memory address. Syntax:

int *ptr; // pointer to int
ptr = &var; // store address of var
*ptr = 10; // assign value at the address

int *ptr; // pointer to int

ptr = &var; // store address of var

*ptr = 10; // assign value at the address

2. Example: Pointer Access

#include <stdio.h>

int main() {
int a = 50;
int *ptr = &a; // pointer to a

printf("Value of a: %d\n", *ptr); // access value
*ptr = 100; // modify value
printf("Modified a: %d\n", a);

return 0;
}

#include <stdio.h>

int main() {

int a = 50;

int *ptr = &a; // pointer to a

printf("Value of a: %d\n", *ptr); // access value

*ptr = 100; // modify value

printf("Modified a: %d\n", a);

return 0;

}

...

C Memory

C Allocate Memory

1. C Allocate Memory In C Allocate Memory, dynamic memory allocation allows programs to request memory from the heap at runtime. Unlike static memory (fixed at compile-time), dynamic memory can grow or shrink as...

C Memory

C Memory Management

1. C Memory Management In C Memory Management programs use two main types of memory: Memory Type Description Stack Stores local variables, function calls, and automatic data. Managed automatically. Heap Stores dynamically allocated memory....

Category: C Memory

C Memory Management Example

C Structures and Dynamic Memory

C Deallocate Memory

C Reallocate Memory

C Access Memory

C Allocate Memory

C Memory Management