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Why doesn\'t C++ support functions returning arrays
C++ does not support functions that return arrays directly because arrays do not have a built-in size or type information that can be returned along with the array. This design choice was made by the C++ creators to avoid memory management issues. But, we have alternative methods to achieve similar result. In this article, we will understand why C++ does not support functions returning arrays and how to overcome this limitation using other techniques. Functions Returning an Array First of all, let's understand what will happen if we try to return an array from a function in C++. Array ...
Read MoreRaw string literal in C++
Sometimes, in C++ when you try to print a string that containing special characters like escape sequences (), backslashes (\), or quotes(""), the output may not be as expected. To avoid this, C++ provides a feature called raw string literal. In this article, we will discuss what is raw string literal and how to use it in C++. What is Raw String Literal? A raw string literal in C++ is a type of string that preserves the formatting of the string content without changing any escape sequences such as "", "\t", or "". This is useful when you want ...
Read MoreDoes C++ support Variable Length Arrays
No, C++ does not support Variable Length Arrays (VLAs). A Variable length array is an array whose size is determined at runtime, not at compile time. These types of arrays are only supported in C99 version of C language. In this article, we will discuss the reasons why C++ does not support VLAs and what alternatives are available for variable array allocation. What is Variable Length Array (VLA)? A Variable Length Array (VLA) is an array whose size can be determined at runtime. It is not supported in standard C++. But, in C99 you can declare a VLA like ...
Read MoreConverting string to number and vice-versa in C++
In this article, we will see how to convert a string to a number and a number to string using modern C++ techniques. Understanding Strings and Numbers In C++, strings and numbers are two different data types. A string is a sequence of characters enclosed in double quotes, and a number can be any numerical value such as integer, float, double, etc. Strings are used to represent text data and numbers are used for mathematical calculations. Let's see an example of defining a string and number. // Define a string string str = "Hello World"; // Define ...
Read MoreHow does delete[] “know” the size of the operand array in C++
The delete[] operator is used to deallocate that memory from heap that was allocated using the new[] operator. In this article, we will explore, what is delete[] operator in C++, how it works, and how it knows the size of the operand array to deallocate the correct amount of memory. The delete[] Operator The delete[] operator is a C++ operator that is used to free memory that was previously allocated for an array using the new[] operator. It is always important to deallocate memory that has been allocated with new[] to avoid memory leaks in your program. If you ...
Read MoreHow do I create a random alpha-numeric string using C++?
Alpha-numeric string are the strings that containing both alphabets and numbers mixed together. These are generally used in security system for generating passwords or hash keys. In this article, we will learn all the approaches for developing a C++ program to generate random alpha numeric stiring. First of all, let's understand the problem statement, We have to input a positive integer for the length of string. The program should output a string of the size containing random characters and numbers. For example, // Input Number : Length of alpha-numeric string 5 // Output String : Alpha-numeric string fd23j ...
Read MoreWhat is the size of a pointer in C/C++?
The size of a pointer in C/C++ is not fixed. It depends upon different issues like Operating system, CPU architecture etc. Usually it depends upon the word size of underlying processor, for example for a 32 bit computer the pointer size can be 4 bytes and for a 64 bit computer the pointer size can be 8 bytes. So for a specific architecture pointer size will be fixed. It is common to all data types like int *, float * etc. Depending on the system architecture, pointer size may vary. The following table shows the pointer size based on the ...
Read MoreC++ Program to Implement Fusion Tree
A fusion tree is a tree data structure that implements an associative array on w-bit integers. Here, W is the number of bits in the integer. A fusion tree is used to maintain the ordered set of elements. It uses a combination of a B-tree and a hash table that helps reduce the time complexity of the operations like insertion, deletion, and searching in the tree. How Fusion Tree Works? The following are the factors that should be considered while implementing the fusion tree: Bit manipulation: The tree extracts specific bits from stored integers and ...
Read MoreHow To Check if a Triangle is Valid or Not When Sides are Given in Java?
A Triangle is a polygon that has 3 sides, and it consists of three sides and three vertices. The sum of the three internal angles is up to 180 degrees. Below is the diagram of a triangle having three sides (a, b, and c): In a valid triangle, if you add any two sides, then it will be greater than the third side. As per our problem statement, we have to check if a triangle is valid or not, if three sides are given, using the Java programming language. Suppose a, b and c are the three sides of ...
Read MoreHow To Calculate Volume of Prism in Java?
A Prism refers to a three-dimensional solid object which has two identical ends. A prism has two faces, which are: Top and Bottom face. Lateral face Both top and bottom faces are called bases which are identical to each other. All lateral faces are also identical to each other which belong to the class of parallelograms. When the base of the prism is triangular in shape that prism is called a Triangular prism. Similarly, when the base of a prism is rectangular in shape it is called a Rectangular prism. ...
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