Category Archive for "C"

Why is “while( !feof(file) )” always wrong?

The usage of the feof() function in a while loop for controlling the reading of a file is a common mistake made by many developers in C programming. In this article, we will discus...

Understanding Undefined, Unspecified, and Implementation-Defined Behavior in C and C++

When writing code in C and C++, it is crucial to understand the concept of undefined behavior (UB), unspecified behavior, and implementation-defined behavior. These terms refer to...

Understanding Array-to-Pointer Conversion in C++

The concept of array-to-pointer conversion, also known as decay, is an important aspect of C++ that developers need to understand. This conversion plays a significant role when wor...

What is the strict aliasing rule?

When it comes to programming in languages like C and C++, understanding the rules and guidelines is essential to ensure the reliability and correctness of our code. One of the conc...

What should main() return in C and C++?

The main() function is the entry point of a C or C++ program. It is the first function that is called when the program starts execution. The main() function can have different retu...

Why isn't sizeof for a struct equal to the sum of sizeof of each member?

When working with structs in C or C++, you may have come across a situation where the size of a struct is larger than the sum of the sizes of its individual members. This can be qu...

How to Find the Size of an Array from a Pointer Pointing to the First Element of the Array

When working with arrays in C or C++, it is important to know the size of the array. However, since arrays decay into pointers when passed to functions or stored in p...

How to Use extern to Share Variables between Source Files

Global variables are variables that are declared outside of any function. They can be accessed and modified from any part of the program. However, when working with m...

How to Properly Compare Strings in C

When working with strings in C, it is important to properly compare them to ensure accurate results. In this article, we will discuss the correct way to compare strings in C and ad...

Correctly Allocating Multi-Dimensional Arrays in C

The allocation of multi-dimensional arrays dynamically in C can be a topic that is often misunderstood and poorly explained even in some C programming books. Therefore, even season...