An array in C++ is a data structure used to store multiple values of the same type in a contiguous block of memory. To know that how values shift from one index to the next, a common and practical technique is to compute the absolute difference between each pair of ... Read More

What are Common Divisors? The common divisors of two numbers are the numbers that are divisors of both. A number is said to divide another number if it leaves no remainder when divided. For example, 3 divides 12 since 12 / 3 = 4 ... Read More

In C, you cannot use a function call on the left side of an assignment if it returns a value because function calls return non-assignable values. For example, function_name() = value; However, if the function returns a pointer, you can dereference it to assign a value. For example, *function_name() = ... Read More

In C/C++, a null pointer is a special pointer that does not point to any valid memory location. Address 0 is used for Null Pointers because address 0 is reserved by the system, and it is guaranteed not to be used for valid data. So, when a pointer is assigned the ... Read More

The binary file stores data in binary format, and data can be written using the write() or fwrite() method in C++. Writing to a Binary File To write a binary file in C++, use write method like fwrite()/write() method. It is used to write a given number of bytes on ... Read More

In C++, a string constant also called a string literal is a fixed sequence of characters enclosed in double quotes (" "). For example: "This is a string" and it is used to read-only memory, and its value cannot be changed during the program. Defining C++ Strings ConstantsYou can define ... Read More

In C++, you can read data from a text file using file handling features provided by the header. This is useful when you want your program to read input stored in a file instead of typing it every time. To do this, you use a special object called ifstream (input ... Read More

Listing files in a directory is used to write a program that opens a specified folder (e.g: "/myfiles"), reads its contents, and displays the names of each file and subfolder one by one. In C/C++, to see all the files in a directory, you can use special system functions that ... Read More

The auto and decltype serve different purposes so they don't map one-to-one. The auto is a keyword in C++11 and later that is used for automatic type deduction. The decltype type specifier yields the type of a specified expression. Unlike auto that deduces types based on values being assigned to ... Read More

Type inference (or type deduction) refers that the compiler can figure out the datatype of a variable or expression automatically, without the programmer needing to write it out. This feature is available in many strongly typed languages like C++, where the type system is strict but the compiler helps to ... Read More