Click the above“Mechanical and Electronic Engineering Technology” to follow us 1. Function Pointers In C++, a function pointer is a pointer that points to a function. They can be used in various scenarios such as callback functions, event handling systems, sorting algorithms, etc. Understanding the type of the function and how to declare and use … Read more
As we know, pointers are used to point to variables; similarly, function pointers are used to point to functions. They are primarily used to store the address of a function. We can use function pointers to call functions or pass function pointers as parameters to another function. Function pointers are mainly useful in scenarios such … Read more
Click the blue words Follow us Function Pointers Functions also have their own addresses; the function name/&function name is the address of the function. 1.1 Basic Form In the study of array pointers, we learned that int arr[5];int (*pa)[5] = &arr;//pa is an array pointer The type of pointer variable pa is int(*)[5]. So what … Read more
Word Count: 14000 Content Quality Index: ⭐⭐⭐⭐⭐ Pointers are crucial in C. However, to fully understand pointers, one must not only be proficient in C but also have a basic knowledge of computer hardware and operating systems. Therefore, this article aims to explain pointers comprehensively. Why Do We Need Pointers? Pointers solve some fundamental problems … Read more
We know that we can create pointers to any data type, such as int, char, and float. We can also create pointers to functions. The code of a function always resides in memory, which means that the function has a certain address. We can obtain the memory address using function pointers. Let’s look at a … Read more
Strings can be defined as one-dimensional character arrays terminated by a null character (‘\0’). Character arrays or strings are used to manipulate text, such as words or sentences. Each character in the array occupies one byte of memory, and the last character must always be 0. The terminating character (‘\0’) is important in strings because … Read more
Click on the blue text Follow us Due to changes in the public account’s push rules, please click “View” and add “Star” to get exciting technical shares as soon as possible Source from the internet, infringement will be deleted 1. Function Pointers Before discussing callback functions, we need to understand function pointers. As we all … Read more
◆Key Point 1: Method to Swap Two Variable Values 1) Using a third variable (the easiest method) 2) Using addition and subtraction to swap values (commonly used in interviews **) The code is as follows: b = a – b; a = a – b; b = a + b; 3) Using bitwise XOR to … Read more
The most common errors related to pointers and memory management are dangling pointers. Sometimes, programmers fail to initialize pointers with a valid address, and such uninitialized pointers are called dangling pointers in C language. Dangling pointers occur when an object is destroyed, and the pointer’s value is not modified when the object is deleted or … Read more
Pointers in C language are variables that store the address of another variable. This variable can be an int, char, array, function, or any other pointer type. The size of a pointer depends on the computer architecture. However, in a 32-bit computer architecture, the size of a pointer is 2 bytes. Consider the following example … Read more