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Learn socket programming in C by building a simple TCP client and server on Debian 12. This tutorial covers creating sockets, connecting, sending, and receiving data with clear code examples using Vim. Socket Programming in C: TCP Client and Server Socket programming lets your C programs communicate over networks. This tutorial shows how to create a TCP client and server using sockets on Debian 12. TCP Server The server creates a socket, binds to a port, listens for connections, and accepts one client. It then receives a message and replies back. Server Code Example // tcp_server.c #include #include #include #include #include #define PORT 8080 #define BUFFER_SIZE 1024 int main() int server_fd, new_socket; struct sockaddr_in address; int addrlen = sizeof(address); char buffer[BUFFER_SIZE] = 0; char *hello = \\"Hello from server\\"; if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) perror(\\"socket failed\\...

Learn how pointers and arrays work together in C on Debian 12 using Vim. Understand their relationship, how to traverse arrays using pointers, and practical examples. Pointers and Arrays in C In C, pointers and arrays are closely related. The name of an array acts like a constant pointer to its first element. This relationship allows pointers to be used for traversing and manipulating arrays efficiently. Array Name as Pointer When you use an array name in an expression, it is converted to the address of its first element. Example: int numbers[3] = 10, 20, 30; printf(\\"%p\\", numbers); // address of first element printf(\\"%p\\", &numbers[0]); // same address Accessing Array Elements with Pointers Pointers can be incremented to move through array elements without using square brackets. int *ptr = numbers; printf(\\"%d\\", *ptr); // first element ptr++; printf(\\"%d\\", *ptr); // second element Complete Example The following ...

Learn how pointers and arrays work together in C on Debian 12 using Vim. Understand their relationship, how to traverse arrays using pointers, and practical examples. Pointers and Arrays in C In C, pointers and arrays are closely related. The name of an array acts like a constant pointer to its first element. This relationship allows pointers to be used for traversing and manipulating arrays efficiently. Array Name as Pointer When you use an array name in an expression, it is converted to the address of its first element. Example: int numbers[3] = 10, 20, 30; printf(\\"%p\\", numbers); // address of first element printf(\\"%p\\", &numbers[0]); // same address Accessing Array Elements with Pointers Pointers can be incremented to move through array elements without using square brackets. int *ptr = numbers; printf(\\"%d\\", *ptr); // first element ptr++; printf(\\"%d\\", *ptr); // second element Complete Example The following ...

Learn how to get user input in C using scanf and getchar on Debian 12 using Vim. Includes practical examples and clear explanations to understand both methods. User Input in C: Using scanf and getchar Getting input from users is a fundamental skill in C programming. It lets your program interact with users dynamically rather than using fixed data. Two commonly used functions for input are scanf() and getchar() . scanf() Function scanf() reads formatted input from the standard input (keyboard). It is ideal for reading integers, floats, characters, and strings. Example: int age; scanf(\\"%d\\", &age); Here, %d tells scanf() to read an integer, and &age passes the address of the variable to store the input. getchar() Function getchar() reads a single character from the user. Unlike scanf() , it is more low-level and does not require format specifiers. char ch; ch = getchar(); C...

Learn how to get user input in C using scanf and getchar on Debian 12 using Vim. Includes practical examples and clear explanations to understand both methods. User Input in C: Using scanf and getchar Getting input from users is a fundamental skill in C programming. It lets your program interact with users dynamically rather than using fixed data. Two commonly used functions for input are scanf() and getchar() . scanf() Function scanf() reads formatted input from the standard input (keyboard). It is ideal for reading integers, floats, characters, and strings. Example: int age; scanf(\\"%d\\", &age); Here, %d tells scanf() to read an integer, and &age passes the address of the variable to store the input. getchar() Function getchar() reads a single character from the user. Unlike scanf() , it is more low-level and does not require format specifiers. char ch; ch = getchar(); C...

Learn how to use formatted input and output in C with printf and scanf. This tutorial explains format specifiers and how they help in displaying and receiving data properly in C programs on Debian 12 using Vim. Formatted Input and Output in C Formatted input and output allow you to control how data is displayed or received in C. The printf() function is used to display formatted output, while scanf() is used to read formatted input from the user. What Are Format Specifiers? Format specifiers define how different types of data are handled in printf and scanf . They act as placeholders for variables. %d : Integer %f : Floating-point number %c : Single character %s : String Example Code Using printf and scanf This example demonstrates reading and displaying an integer, float, character, and string using formatted input and output. #include int main() int age; ...