C-C programming: compiler, code, run

Example

int *ptr = &variable;

Scenario

Pointers in C are variables that store the address of another variable. They allow direct memory manipulation and can be used to dynamically allocate memory, handle arrays efficiently, and facilitate complex data structures like linked lists and trees.

Example

struct Person { char name[50]; int age; };

Scenario

Structures (structs) allow grouping different data types into a single unit. They are useful for modeling real-world entities with varied attributes, such as a 'Person' with a name and age, or a 'Point' with x and y coordinates.

Example

printf("Hello, World!");

Scenario

The C standard library provides functions for input/output, string manipulation, mathematical computations, and more. For example, 'printf' is widely used for formatted output, 'fopen' for file handling, and 'memcpy' for memory operations.

Example

#ifdef DEBUG printf("Debug mode"); #endif

Scenario

Conditional compilation enables the inclusion or exclusion of code based on certain conditions. This is useful for building different versions of software for testing, debugging, or specific environments by using preprocessor directives like '#ifdef'.