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C++ Articles
Page 350 of 597
Read whole ASCII file into C++ std::string
This is a simple way to read whole ASCII file into std::string in C++ − Algorithm Here is the algorithm we will follow to Read the whole ASCII file into C++ std::string. Begin Declare a file a.txt using file object f of ifstream type to perform a read operation. Declare a variable str of string type. If(f) Declare another variable ss of ostringstream type. Call rdbuf() function to read the data of the file object. Put the ...
Read MoreMatrix Chain Multiplication (A O(N^3) Solution) in C++
If a chain of matrices is given, we have to find a minimum number of correct sequences of matrices to multiply. We know that the matrix multiplication is associative, so for four matrices ABCD, we can multiply A(BCD), (AB)(CD), (ABC)D, and A(BC)D, in these sequences. Like these sequences, our task is to find which ordering is efficient to multiply.ExampleIn the given input there is an array say arr, which contains arr[] = {1, 2, 3, 4}. It means the matrices are of the order (1 x 2), (2 x 3), (3 x 4). Input − The ...
Read MoreProgram for Point of Intersection of Two Lines in C++
Given points A and B corresponding to line AB and points P and Q corresponding to line PQ; the task is to find the point of intersection between these two lines. Note − The points are given in 2D plane on X and Y coordinates. Here A(a1, a2), B(b1, b2) and C(c1, c2), D(d1, d2) are the coordinates which are forming two distinct lines and P(p1, p2) is the point of intersection. (just for a diagrammatic explanation of the point of intersection) How to find the point of intersection − Let’s take the above figure as − Example So ...
Read MoreC++ program to return all Boundary Elements of a Matrix
boundary elements of a matrix The boundary elements of a matrix are those elements that lie along its edges. A matrix is a two-dimensional array that can be of any given size. The boundary elements are those present on the edges of the matrix. Problem Description We are given a matrix of size m × n. We need to find the boundary elements of the matrix. Boundary elements are the elements present on the top and bottom rows and the first and last columns of the matrix. Below are examples to understand the boundary traversal of a matrix: ...
Read MoreC++ Program to Return Quadrants in which a given Coordinates Lies
Cartesian-coordinate System and Quadrants The cartesian-coordinate system is divided into four Quadrants: Quadrant I, Quadrant II, Quadrant III, and Quadrant IV. In this article, we are going to learn how we can determine the quadrant in which given points i.e., x and y, lie. Problem Description We are given the position of a point (x, y), and we have to determine in which quadrant this point lies. Example Input: (-3, 2) Output: Quadrant II Input: (2, 5) Output: Quadrant I Input: (2, -4) Output: Quadrant IV Input: (-6, -3) Output: Quadrant III Using Conditional Quadrant Identification Approach ...
Read MoreParallelogram Star Pattern using C++
When we start learning to code, practicing star patterns is one of the best ways to improve logic building. One of the engaging patterns is the parallelogram pattern. In this article, we are going to learn how to print a Parallelogram Star Pattern using C++. What is Parallelogram Pattern? A parallelogram pattern is a geometrical arrangement of stars in a parallelogram shape. The stars are printed in such a manner that if we draw a closed figure on the boundary of the printed pattern, it will resemble a parallelogram. Each row is shifted with space, which creates a diagonal ...
Read MoreC++ Program for Sum of Infinite Terms in GP
What is Geometric Progression (GP)? Geometric Progression (GP) is a sequence of numbers where each term is generated by multiplying the previous term by a constant value. This constant value in GP is known as the common ratio. In this article, we are going to discuss how to calculate the sum of infinite terms in a GP using different approaches in C++. Note: The important condition to remember is that a positive valid sum of infinite GP is only possible if the absolute of the common value (r) is less than 1, i.e., ∣r∣ < 1. Methods to Calculate ...
Read MoreC++ Program to check if a Number is Harshad Number
A Harshad number is a special type of number. A Harshad number or Niven number is a number that is completely divisible by the sum of its digits without leaving any remainder. In this article, we are going to learn how we can check whether a given number is a Harshad number or not. Problem Description We are given a number and we have to return true if the given number is Harshad or Niven number and false if the given number is not a Harshad number. Example 1 Input: 108 Output: yes Explanation: The sum ...
Read MoreNested Classes in C++
A nested class is a class that is declared in another class. The nested class is also a member variable of the enclosing class and has the same access rights as the other members. However, the member functions of the enclosing class have no special access to the members of a nested class. Syntax Here is the basic syntax defining and using nested classes in C++. class OuterClass { // Members of the outer classpublic: // Nested class definition class InnerClass { // Members of the inner class };}; Accessing Nested Classes To access a nested class from outside ...
Read MoreLocal Class in C++
A class declared inside a function is known as a local class in C++ as it is local to that function, where its scope is limited to that function. Syntax Here the syntax for a local class is given as follows. #include using namespace std; void func() { class LocalClass { }; } int main() { return 0; } In the above syntax, func() is a function, and class LocalClass is defined inside the function. So, it is known as a local class. A local class name can only be used in its function and not outside it. Also, the ...
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