A list of C topics at OpenGenus IQ

Integer datatype in C: int, short, long and long long

In C programming language, integer data is represented by its own in-built datatype known as int. It has several variants which includes int, long, short and long long along with signed and unsigned variants The size of int is 4 bytes and range is -2147483648 to 214748364 long long is of 16 bytes

C Programming

Multithreading and pthread in C

In this article, we have explored how the pthread library in C can be used to implement concepts of multithreading. A thread is a single sequence stream within in a process.

C Programming

Semaphore in C

Semaphore is a data handling technique which is very useful in process synchronization and multithreading. We used the POSIX semaphore library and use the functions sem_wait, sem_post, sem_open and sem_init for implementing semaphore in C.

Software Engineering

Implementing printf and scanf in C

Understanding how printf and scanf works internally is the key to writing advance code. Key concepts involved are variable number of arguments in functions using vararg in C. Use of internal buffer to prepare the input or output.