C NULL
🔹 C NULL NULL is a special constant in C used to represent a null pointer, meaning the pointer does not point to any valid memory location. It is defined in multiple header files...
Category: C Tutorial
C Debugging
🐞 C Debugging Debugging is the process of identifying and fixing errors (bugs) in a C program. Errors can be logical, runtime, or compile-time. Debugging helps ensure the program behaves as expected. 🔍 Why...
C Memory Management Example
📌 C Memory Management Example (Complete Program) Here is a full practical example demonstrating malloc, calloc, realloc, and free all in one program. ✅ Full Example: Dynamic Array with Memory Operations #include <stdio.h> #include...
C Structures and Dynamic Memory
📌 C Structures and Dynamic Memory Allocation 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 unknown during compile...
C Deallocate Memory
🧹 C Deallocate Memory (free()) In C programming, 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 the...
C Reallocate Memory
✅ What is realloc()? 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 Decrease the memory block size...
C Access Memory
1. Accessing Memory Using Pointers A pointer stores the address of a variable. Use dereferencing (*) to access or modify the value at that memory address. Syntax:
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int *ptr; // pointer to int ptr = &var; // store address of var *ptr = 10; // assign value at the address |
2. Example: Pointer Access
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#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; } |
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C Allocate Memory
1. What is Dynamic Memory Allocation? In C, 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 Management
1. Memory in C C 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. Managed manually using...